Guard Your Heart

Guard Your Heart
"Above All Else, Guard Your Heart, For Everything You Do Flows From It." - Proverbs 4:23

Friday, August 18, 2017


"Who may ascend into the hill of the Lord?
Or who may stand in His holy place?

He who has clean hands and a pure heart,
Who has not lifted up his soul to an idol,
Nor sworn deceitfully"

(Psalm 24:3-4)


God is after the heart of worship, and so is the devil. In the last days, the enemy is relentless and aggressive to hijack all the worship that belongs to God. One of the ways he does is to defile the altar of our hearts through idolatry. What is the responsibility of every Christian? The thrust of this book addresses the question: “What does the heart of a worshipper look like?” For worship to be authentic, it has to be wholehearted and undefiled 

-  Ricky Sim  -


Ricky Sim goes after the heart of the matter in this book: The heart. He shows us so well that for worship to be authentic, it must be wholehearted.
But Ricky doesn’t really play it safe with this book. He doesn’t colour inside the lines. He doesn’t honour the boundaries of that which is politically correct. Among other things, he goes after one of the biggest “heart problem” in our day – Idolatry.
Idolatry. Just talking about it is a sure-fire way to guarantee that nobody wants to buy your book. Nobody wants to believe that it’s actually an issue in our hearts.
It’s time to sit up straight and look at this beast of the heart. It’s time to shine the light of truth and wisdom on that part of our heart that is so easily touched by the idols of possessions, pleasures and powers.
When I listen to Christian podcasts today, many of them chart a course that actually supports and validates covetousness of idolatry. It has suddenly become a noble thing to earnestly desire more sales, more profits, more reach, more comfort. All the more reason for a book like this to call us back to the heart of worship.
There’s only one way I know to deal with idolatry, and that is by the violence of incessant repentance. Whenever you see it, take out the sword of the Spirit and hack off that vine. And be aware that the tendrils of idolatry, for they always grow back again. They will launch yet enough effort to wrap around your heart and pull your mind down from things above (Colossians 3:1). The heart’s war against idolatry is not a victory we conquer, but a battle that we engage in on a daily basis. The same is true for most issues of the heart.
Idolatry. That’s only one of many heart issues that Ricky tackles in this book. Buckle up, start with chapter one, and go after the heart of the matter: The heart.

Bob Sorge



Ricky meticulously traces through the Scriptures from the Old Testament to the New Testament to discover the heart of a true worshipper of God. In the book he details what pleases or offends the Lord and offers the reader practical applications to become a worshipper that delights the Lord.
I highly recommend this book to every believer embarking on this journey.

Pastor Daniel Foo
Senior Pastor and Lead Elder – Bethesda (Bedok-Tampines) Church Singapore & Faculty with Haggai Institute, Tung Ling Bible School and Eagles Leadership Institute.

In this book, Ricky Sim has chosen to address the critical issue of the heart. Out of the heart flows the issues of life and only God can redeem the human heart. Not only did Ricky seek to diagnose what is wrong with the human heart because of sin but he has also highlighted the work of Christ on the Cross to redeem it. He went on further to provide us with fiercely biblical and highly practical handles to continue cultivating a pure and undefiled heart before God. This is one of the most comprehensive and helpful work on the human heart that I have come across in recent times. So read this book and be blessed!

Pastor Benny Ho
Senior Pastor - Faith Community Church, Perth
Founder - Arrows School of Ministry

All that my dear friend Ricky writes in this book is firmly embodied in his lifestyle as a worshipper of Christ. These are biblical truths about worship that have not just been learnt, but lived through as Ricky journeys in the grace of God. So when he writes about the shattering of the altars made to false idols in our lives, he beautifully writes from the gracious place of experience. Definitely a necessary read for those who take their worship seriously.

Pastor Neli Atiga
Senior Pastor
Every Nation Church, Brisbane

Ricky Sim is a man who is passionate about worship. While he is a worship leader, it is clear through his writing that worship is not merely about worship leading in a service. For Ricky, worship leading extends beyond the service, it has to affect every part of daily life. And at the heart of it all, Ricky tells us that it is a matter of the heart. Is the heart one that loves and fears God or one that loves the world and fears man? In his own words, “If the fear of the Lord is the beginning of wisdom, then the fear of man is the end of it.” There is good teaching in this book – lots of it – that will help the reader understand more about the issues of the heart and begin a life of holiness. Take your time, savour every bit of it and let God cultivate and purify your heart through this book in one hand and the Bible in the other, so that you might see God.”

Rev Barnabas Chong
Pastor, Christ Methodist Church

Ricky has done well in capturing the essence of the heart. Since his days at Tung Ling Bible School, we hear his heartbeat for the matter of the heart. As they say, “The heart of the matter, is the matter of the heart.” In this third edition of a series of books on the heart matter, Ricky continues to deal with the issues of the heart of a worshipper. A wonderful treatise on The Undefiled Heart. Without doubt, you must give your undivided heart to read it. Congratulations Ricky on the publishing of yet another title. We are proud of you!

Ong Guek Ju
Principal, Tung Ling Bible School


Part 1 – A Pure Heart 
Chapter 1 Clean Hands and a Pure Heart
Chapter 2 Blessed are the Pure in Heart
Part 2 – An Undefiled Heart 
Chapter 3 What Defiles our Hearts?
Chapter 4 The Golden Calf
Chapter 5 Baal, Ashtoreth, Molech
Chapter 6 Demolishing the High Places
Chapter 7 Defiling the Temple of God
Chapter 8 Rebuilding the Temple of God
Part 3 – A Steadfast Heart 
Chapter 9 Who Gets the Worship?
Chapter 10 The Unstoppable Worshipper
Part 4 – A Passionate Heart
Chapter 11 Are you a Worshipper?
Chapter 12 The Essence of Worship
Chapter 13 Worshipping the Ways of God
Chapter 14 The Undefiled Heart


The Undefiled Heart is the third book on the “Guarding the Hearts” series. The first book is “The Unguarded Heart” and the second is “The Undivided Heart.”

In The Unguarded Heart, I have addressed the following questions: What is the heart? Why do we need to guard our heart? And, how do we guard our heart?

In The Undivided Heart, the book is about making choices. We need to choose to stay guarded and deal with issues of the heart (e.g. anger, envy, jealousy, unforgiveness, pride, greed, lust, etc.) that could affect our walk with the Lord Jesus Christ and our devotion to God.
It defines as: “One who has a devoted, a dedicated, and a committed heart in his relationship with God. This wholehearted devotion is possible because he chooses to walk in partnership with the Holy Spirit and in the reverential fear of the Lord, which result in a lifestyle of obedience to the Lord in all he does.”

In this book, The Undefiled Heart - It is an expansion from The Unguarded Heart. Here the focus is about having a pure heart, an undefiled heart, a passionate heart, and a steadfast heart in worshipping God. We can only do so when we choose to love the Lord wholeheartedly:

“And you shall love the Lord your God with all your heart, with all your soul, with all your mind, and with all your strength.’ This is the first commandment” (Mark 12:30).

It is more than expressing a love song, singing a worship song, or playing an instrument, but it is a heart that is committed to being in an intimate relationship with God and walking in obedience to His commands.

It is about being a worshipper rather than doing worship. The emphasis is at the heart of a lifestyle worshipper as compared to the art of worship. We are familiar with the story of Mary and Martha, who worship and serve Jesus, respectively.

“Now it happened as they went that He entered a certain village, and a certain woman named Martha welcomed Him into her house. And she had a sister called Mary, who also sat at Jesus’ feet and heard His word. But Martha was distracted with much serving, and she approached Him and said, ‘Lord, do You not care that my sister has left me to serve alone? Therefore tell her to help me.’
And Jesus answered and said to her, ‘Martha, Martha, you are worried and troubled about many things. But one thing is needed, and Mary has chosen that good part, which will not be taken away from her.’” (Luke 10:38-42).

Today, Jesus is still addressing that one thing which Mary does that is needful, and that is, to have a heart that is pure, passionate, steadfast, and an intimate relationship with Him! You see, Martha knows how (about serving), but Mary knows Him! (about intimacy). The key is to first be a worshipper and then do worship! Otherwise, we may end up doing worship ritualistically, but our hearts may be far away from Him.
Jesus warns:

“This people honours Me with their lips, but their heart is far from Me. And in vain they worship me, teaching as doctrines the commandments of men. For laying aside the commandment of God, you hold the tradition of men” (Mark 7:6b-8a).
“Inasmuch as these people draw near with their mouths and honour Me with their lips, but have removed their hearts far from Me, and their fear toward Me is taught by the commandment of men” (Isaiah 29:13).

Today, the Father is still seeking, yearning and longing for worshippers who will choose one thing – to put their hearts into worshipping Him in spirit and truth (John 4:24).
“But the hour is coming, and now is, when the true worshippers will worship the Father in spirit and truth; for the Father is seeking such to worship Him. God is Spirit, and those who worship Him must worship in spirit and truth” (John 4:23-24).
May this book revolutionise our perspective about being a lifestyle worshipper who will please the Father’s heart.

One of such worshippers found in the Bible is none other than King David. He said: “One thing I have desired of the Lord, that will I seek: That I may dwell in the house of the Lord all the days of my life, to behold the beauty of the Lord, and to inquire in His temple” (Psalm 27:4).
We all know that King David was not a perfect man. He was not just an adulterer; he was also a murderer of Bathsheba’s husband, Uriah. When confronted by the prophet Nathan, he was convicted of his sins and humbly repented before the Lord (2 Samuel 11).
Does this story speak to us? In Jeremiah 17:9, the Lord said that “the heart is deceitful above all things, and desperately wicked; who can know it?”
Will we be able to pray the prayer of King David: “Create in me a clean heart, O God; and renew a steadfast spirit within me” (Psalm 51:10)?
Through David’s wholehearted repentance, God forgave him and gave him the new heart (a pure heart) that He was after:
“The Lord has sought for Himself a man after His own heart” (1 Samuel 13:14a).
“I have found David the son of Jesse, a man after My own heart, who will do My will” (Acts 13:22).

With the above synopsis, we will now step into the journey of a lifestyle worshipper by addressing the thrust of this book: What does the heart of a worshipper look like?
He is one who has an undefiled heart. We can seek to have an undefiled heart by asking ourselves some of these vital questions:
- What defiles our hearts?
- Why we must choose to worship God alone and no other gods?
- How do we become a lifestyle worshipper who worships God in spirit and in truth as such bringing pleasure to Abba Father God?

To have a pure heart is to be single-minded, and our hearts need to focus on one thing: That it is not distracted nor cluttered in our devotion to God.

God is after our hearts of worship, and so is the devil! We have a choice to give God our full, undivided attention and devotion.

“Worship is in the Heart and not in the art”
- The Praise and Worship Connection -

Friday, May 12, 2017


Be blessed with some new testimonies:

Senior Pastor @ SCOC Ministries, April 2017, Uganda

Greetings, just concluded reading both books this morning. You have put down life materials that the body of Christ must receive and hear! God bless you brother Ricky. May 2017

John Gabriel, May 2017, Philippines
This book helps me on how to stay focused on the Lord and teaches me to deal any issues that overtakes surprisingly in my life. And now, I'm going to dive in into Part 3 and I'm not finished yet. Ha ha, thank you for this book pastor, can't wait to see your next book called #UndefiledHeart. If we want to experience the fullness of the Holy Spirit and experience the marvels of God's grace and overflowing blessings. Read this book called #UndividedHeart

Brother Ken Saki, May 2017, Japan
I have been very blessed by your books. It was given by your sister when she visited Japan. I have been using your book to share with my cell members. God bless you!

Brother Vikram, November 2016, India
Feeling blessed. Traveling from Delhi to Chandigarh and I am planning to finish this as much as possible book. Much thanks for this valuable gift.
Please consider visiting us next year. You have such a powerful and much needed message. We can plan things prayerfully and strategically to gather the people to hear the message so that they can mature and walk with God with a purer heart.

Monday, June 27, 2016


May you be blessed by these video testimonies: 

Sister Vanice from the Philippines 2016

Pastor Yet from Myanmar 2015

Sister Flor from the Philippines 2015

Thursday, December 4, 2014


“Teach me Your way, O LORD;
I will walk in your truth;
Unite my heart to fear Your name.”
Psalm 86:11

"The undivided hearted believer is one who has a devoted, a dedicated, and a committed heart in his relationship with God. This wholehearted devotion is made possible because he chooses to walk in partnership with the Holy Spirit and in the reverential fear of the Lord, which result in a lifestyle of obedience to the Lord in all that he does"
Ricky Sim


Part 1: The Undivided Heart - You Have A Choice
Chapter 1: The Quest for an Undivided Heart
Chapter 2: The Commitment of an Undivided Heart
Chapter 3: The Choice of an Undivided Heart
Chapter 4: Two Men, Two Ways, Two Destinies

Part 2: The Undivided Heart - Dealing With The Issues of Life
Chapter 5: Envy and Jealousy
Chapter 6: Anger
Chapter 7: Anxiety and Worry
Chapter 8: Covetousness
Chapter 9: Pride
Chapter 10: Lust

Part 3: The Conclusion
Chapter 11: Walking in the Spirit
Chapter 12: Walking in the Fear of the Lord
Chapter 13: God is After the Whole Heart


It doesn't take long for one to notice that Ricky Sim eats, breathes, sleeps, and talks only about his love for Jesus. I had the privilege to work closely with him on several Praise & Worship projects and I often came away impressed with his single-minded dedication to God. It was so genuine that it emanates through his being. Worship for him is not just the music and songs in which we both played and sang together so often. Worship is his lifestyle.
Though I may not know many authors who may have written similar topics in the past, I do know Ricky. Reading this new book is like having a chat with him in the coffee shop. I cannot put it in any other ways, but just “it is so Ricky.”
The Undivided Heart, which I believed was compiled from his own years of experiences, speaks volume of his selfless intention to encourage and motivate others along.
He personified what he wrote on page 29 - “A believer with an undivided heart is one who walks in the fear of the Lord and in obedience to God’s Word.” Those who know him would attest to this.
The heart of the matter is the matter of the heart as he inferred to in Part Two of this book. As a Psychologist, I am impressed with the manner in which Ricky was able to take on some of the most challenging emotional issues of life head on. More than just raising the problems that often crowd our attention away from God, he also articulated ways how his readers could overcome them, in clear and succinct ways. The way he skillfully weaved Bible verses into our daily struggles is an art in itself and thus, made it a joy to read.
I have no doubt that this book, “The Undivided Heart” is another winner in the making and I commend Ricky for an excellent job in publishing this book.
Dr. Fred Toke, PsyD
Chief Operations Officer, Asian Seminary of Christian Ministries

The author and I went back more than three decades ago… while he chose to serve God in the marketplace, I had answered the call to full-time ministry. All these years, I have known Ricky to be steadfast and faithful to our Lord Jesus Christ. He is gifted in the area of worship ministry and uses this gift to glorify his Saviour.
His latest book, The Undivided Heart, is a reminder that we all have choices to make and that we decide where we end up on this journey of faith. We must guard our hearts in an increasingly corrupted and godless culture. I especially like the part where he emphasizes that we must not be a “two-timer” in our relationship with God. We cannot have one leg in the Kingdom of God and the other in the world - wanting God’s favor and at the same time desiring all the world can offer.
This strong message is much needed today. Ricky reminds us that we must make choices and take action to ensure our hearts are undivided, and to uphold the biblical standards entrusted to us. You will be challenged as you digest the timeless principles found in this book.
Rev Lawrence Seow - Evangelist-Revivalist

Our ‘heart’ is the most important subject that requires our attention and we need to do our utmost to understand it. As Christians, having ‘undivided heart’ is the key to achieve success in both our physical and spiritual lives. With our willingness to change and having our focus on Jesus Christ, God will be able to give us a change of heart.
I highly recommend Ricky Sim’s book titled ‘The Undivided Heart’ to those who wish to live a successful and meaningful life which pleases our Almighty God.
Rev. Song Meng Liang - Senior Pastor, Church of Singapore Bukit Timah

I have known Ricky as one who enjoys and loves to worship God. What Ricky has written is simple but profound. Practical yet insightful. If you are concerned about the issues of your heart, this book is a must-read for it instructs, warns, teaches and advises the ways of the Lord. It urges you to make the right choice of walking in the fear of the Lord with wholehearted devotion.
Doris Ng - Senior Director, Life Coach
Author of Multiplying Marketplace Miracles/Marketplace Manna/
Marketplace Manners/Soul Food


What God desires more than anything else is our heart and it is also what the devil wants most as well. This is because the “heart” in
Scripture is seen as the master control area of our lives. It defines who we are and determines what we become.
Our hearts can be our greatest treasure or a most grievous traitor, it depends what has captured and controls them.
Jesus said that a kingdom divided against itself cannot stand and neither can a heart that becomes divided within itself. When you hear of the latest tragic account of a well-known Christian man and woman and their ministry “fall and fail” morally or monetarily, it is because at some point, their hearts became divided. They didn’t stop loving and serving God, but they also began to love and serve the gods of lust and mammon alongside Him.
This is why the great call of the Old Testament is to love God with all our hearts and Jesus says the greatest commandment is to love God with all our hearts. The commandments made clear we are not only to have no other gods before God and also no other gods beside Him.
In his latest excellent book, The Undivided Heart, Ricky Sim takes us on a journey through the Scriptures and the lives of many of its prominent characters to show the dangers and destructiveness of a divided heart. Even more importantly, he explains how we can avoid the shipwreck of such a condition and live in God’s blessing and walk in integrity. He reveals the causes and cure for a heart that has become captured and corrupted by the world, the flesh and the devil.
He also shows us the benefits and blessings of a heart totally yielded to an undivided before God. What he says will not only inform you, but also help to transform your life,
Rev. David Holdaway
Elim Pentecostal Church (United Kingdom)

Author of more than 20 books, including The Captured Heart/The Burning Heart/The Issues of The Heart/Revival Is a Heart Issue


The book is a continuing series from my first book - The Unguarded Heart. Proverbs 4:23 says, “Above all else, guard your heart, for everything you do flows from it” (NIV).
For many months now, I have been searching deeper at what the Scriptures have to say about the importance of the guarding of the heart. In writing this second volume, I am challenged to look specifically on the subject concerning the believer’s choice to walk with an “undivided heart” in relation to our devotion to God and why it matters?
Firstly, in practice, the guarding of the heart simply means preparing our heart in advance so that when someone “blows it” – for an example when dealing with the issues of life, such as unforgiveness, anger, bitterness, pride, lust, envy, greed, etc. We are ready to choose to stay guarded in the Lord and by His grace let go and move on. Somebody has to get spiritual first; let it be us.
Secondly, this book is also an invitation to step into the prayer of King David, the psalmist:
“Teach me your way, O LORD; I will walk in Your truth; unite my heart, to fear Your name.” (Psalm 86:11)
“God’s way and David’s walk” are metaphors on how the psalmist ought to conduct his faith in the Lord, which is choosing to do God’s will and obeying His commandments. David had made a choice (“I will walk”) to walk in the way of the Lord. This had led him to the next step, which is to desire to be steadfast in his devotion with an undivided heart. He was able to do so because he had chosen to walk in the fear of the Lord as seen in the following verse:
“Blessed are those who fear the Lord, who walk in His ways.”
(Psalm 128:1)

At this point, I wish to address the earnestness of having an undivided heart. In these last days, we cannot be a “two-timer” in our relationship with the Lord, where one foot is in the Kingdom of God and the other foot is entangled in the system of the world. As we witness the many end-time signs being fulfilled right before our eyes, we need to be watchful that there are many distractions surrounding us. These temptations will lure us away from the one important thing we need more than anything else as we anticipate our Lord’s soon return – Our intimate relationship with God.
The Apostle Paul warned us to:
Work out our own salvation with fear and trembling” (Philippians 2:12) and we are to “walk circumspectly, not as fools, but as wise, redeeming the time because the days are evil” (Ephesians 5:15-16).
Jesus also warned us in Matthew 25:1-13 of the parable of the wise virgins and the foolish virgins. The wise virgins had extra oil while the foolish virgins did not. Let us choose to be the wise virgins to ensure that we have sufficient oil in our lamps to be ready for the soon coming of the bridegroom. Please note that both the wise virgins and the foolish virgins had the same opportunity to buy oil. However, only the wise virgins chose to take extra oil in their vessels with their lamps.
There is therefore an urgent call to stay vigilant with an undivided heart, with the reverential fear of the Lord. We cannot walk with God and yet holding hands with the devil. There’s a choice to be made by all. Let us be wise and walk circumspectly so that we will fulfil God’s destiny for us.
Blessings, Ricky Sim

Wednesday, December 3, 2014


For author Ricky Sim, accounts of biblical figures succumbing to temptations are a powerful reminder that the human heart is prone to stray and deceitful, and needs to be protected.

Speaking in an interview with The Christian Post, Ricky, 56, who wrote The Unguarded Heart: Everything You Do Flows From It (self-published, 2012), highlighted the cases of David and Solomon, two kings of Israel.

The book addresses the biblical understanding of the heart, the need to guard it, how to do so, and the heart of a worshipper. A public and private book launch was held on Palm Sunday.

Explaining the meaning of the title of his first book, Ricky noted that he had been asked why it is important to guard one's heart.

"If you don't guard it, everything will fail," said the avid Christian blogger, songwriter, and worship leader.

Spirituality itself is no insurance against succumbing to temptation. King David was commended as a man after God's heart. And yet he committed adultery and murder after seeing a woman bathing one day.

King Solomon, said to be the wisest man of his time, is another extreme case. His many wives turned his heart away from God.

The same pressures of life exist today. This often takes the form of the temptation to pursue wealth, power, and pleasure at all costs.

Another reason for guarding the heart is that God is concerned about it.

"If your heart is not right, your worship can become... noise," said Ricky, citing 1 Corinthians 13. After all, God admonished the Israelites in the Old Testament for not putting their heart into their worship, he added.

Ricky, an engineer, observed that the Kingdom of God has been an emphasis of the Christian community in recent years. As he wrote his book, he asked God how his subject fits into the flow of things.

His answer: "If your heart is not right, you can be talking about the Kingdom of God (but) it won't work."

An unguarded heart affects one's personal relationship with God. One begins to lose interest in reading the Word of God and becomes more prone to succumbing to temptation.

Spending hours watching television and neglecting Bible reading, and an inclination toward anger, hatred, bitterness, envy, jealousy may be signs of an unguarded heart.

In regard to guarding the heart, Ricky believes it is important to commit one's heart to the Lord and to sing to Him in worship on a daily basis. Christians should also guard their devotional time with God, memorizing and obeying His Word, and allow the Holy Spirit to teach, guide, counsel, convict, and lead them.

Strengthening one's personal relationship with God is an effective way of dealing with the numerous temptations. In his book, Ricky included the story of a Christian who, when he heard, Satan knocking at his door, promptly sent Christ to answer it.

The author hopes that his book will inspire Christians and help them to offer beautiful and clear hearts to God. An unguarded heart is a horrible thing, he expressed. The book's cover illustration of a fragmented heart shows this. Seeing the picture, one of its endorsers even described the book looked like a 'horror book'.

He encourages readers of his book to re-read it and allow it to become part of their daily life.

Ricky was motivated to write by a writer's workshop held two-and-a-half years ago. He is already planning to write two more books. One will be at the heart of the psalmist and another about 52 ways to guard the heart.

Note: This article was published in The Singapore Christian Post in May 2012.

Saturday, March 24, 2012


"Above All Else, Guard Your Heart, For Everything You Do Flows From It"
Proverbs 4:23 (NIV)

The inspiration to write a book on the subject of the heart came to me about two years ago. Did you know that this subject is addressed in the Bible more than any other topics - more than faith, hope, love and even more than worship? But of course, all these spiritual expressions are matters of the heart. The many Scripture references in the Bible concerning the matters of the heart surely imply the importance God has placed it in His Word. It is also enthralling to note that there are many songs written with lyrics and expressions about the heart. However, this is one subject that is rarely preached from the pulpits and you can only find a handful of books written on it.
The heart is the center and seat of our spiritual life. It dictates to a great extent how we live. The heart is also a fickle thing; it is easily drawn into enticements of the world and compulsions of the flesh. That is the reason why the Bible says, "above all else, guard it!" This is more than a warning or admonition, it is a command!
It is my sincere prayer that as you dig into this book you will allow the Holy Spirit to speak to your heart as He has done to mine. May you be enlightened by the many revelations the Lord has placed upon my heart and reveal you to new insights on how to personally guard your own heart. Ultimately, we need to be vigilant, steadfast and disciplined to continuously practice the guarding of our hearts to ensure that we stay devoted within the boundary of God's will and purposes for our lives and for His kingdom. This conscientious act when exercised on a daily basis will ensure that our hearts stay within the covering of the Holy Spirit's guidance and protection.

Foreword/Preface/Acknowledgements/ Introduction                                                                                                                         Chapter 1 - The Quest Of Guarding Our Hearts
Chapter 2 - What Really Is The Heart?
Chapter 3 - Guarding The Heart Is Our Responsibility
Chapter 4 - The Gateway Into Our Hearts
Chapter 5 - Our Hearts: In The Parable Of The Sower
Chapter 6 - Setting Spiritual Boundaries
Chapter 7 - A Better Way: Guarding From Inside-Out
Chapter 8 - The Desires Of Our Hearts
Chapter 9 - An Undivided Heart
Chapter 10 - Your Heart Is A Tablet
Chapter 11 - The Heart Of A Worshipper
Chapter 12 - Let's Guard Our Hearts
About The Author

The Purpose of this book is to bring about a real change in your life. The change will happen when you take time to allow the Holy Spirit and the Word of God to address the core issue of your life:

Whether you have been a Christian for many years or recently come to know the Christian faith, this book is for you. I pray that as you seriously internalize the act of guarding your heart; it may become a turning point in the spiritual journey. In essence, the heart is the master control of your life; whatever you open heart to have the power to shape your life and your destiny. If left unguarded, issues such as wealth, relationship, power, possession and much more will entangle your spiritual path.
The content of this book is rather easy to follow. It defines what really the heart is; it explains why the guarding of your heart is so important; it also presents you the guidelines on how to guard your heart. There are many applicable scriptural references and practical examples which will enlighten your understanding. May the Holy Spirit illuminate, empower and transform you to live victoriously and become the person God wants you to be. The re-reading of this book is imperative because the guarding of your heart is a continuous process. Above all, allow the Holy Spirit to be your teacher and guide as you practice the guarding of your heart.
Ricky Sim


" I have known Ricky Sim for many years, and appreciate the legacy of faithfulness and fruitfulness in his life. This book represents Ricky's life message as it has been cultivated and proven in the context of the local church. I believe this book can empower you to establish the kind of guard around your life that will enable you to walk in divine order and blessings."
Pastor Bob Sorge
Authour of widely acclaimed book - Exploring Worship
Founder of Oasis House Ministries (USA)

"There is an old Scottish proverb that says when God measures a man He puts the tape around his heart and not his head. In this excellent book Ricky Sim insightful detail and demonstrates this. He clearly shows that if our hearts are not right then everything else in our lives is negatively affected and out of alignment with God's purposes and that guarding our hearts empower our lives and draw us closer to God.
Ricky also reveals his own heart as a passionate worshipper. As informing as the book is, it is not just theory or knowledge but practical and purposeful. This book is well researched, well written and worth reading and digesting."
Pastor David Holdaway
Elim Pentecostal Church (United Kingdom)
Author of: The Captured Heart, The Burning Heart and The Issues Of The Heart.

"Anyone who reads this book will agree that one should never take his heart for granted. The heart is above all very deceitful and therefore it calls for Christians to be vigilant and to take responsibility to guard his or her heart against the spirit of this world.
This book must be a read book for every believer and a timely reminder to mature believers."
Rev. Alfred Yeo
Senior Pastor
Zion Full Gospel Church
(Affiliated with the Assemblies of God Singapore)

"I have known Ricky for many years now and have witnessed his selfless service in our church, especially in the Worship Ministry. This small book comes from a big heart with a big message. Out of our hearts flow the issues of life and this alone cries out the special need for guarding it. Scouring through endless bookshops I can hardly find such a book that focuses on this important topic and Ricky covers every aspect with great insight and care. I heartily endorse this wonderful little book that comes from the pen of one whom I have witnessed diligently seeking to guard his own heart."
Rev. Timothy James Gibson
Pastor (English Service)
Church of Singapore (Bukit Timah)

"Ricky has a passionate and tender heart that is continually seeking and drinking from the Source of life, our great all-sufficient and Almighty God. In The Unguarded Heart, Ricky is able to intricately weave and teach with great insights drawn from his personal encounter and experience as a worshipper, the steps that will draw the reader to a more intimate and vibrant relationship with Abba Father.
This book is a great resource for those who yearn to draw closer to the heart of God. It provides guidance in how a believer can live victorious in this ever changing and challenging world at large. You will be richly blessed in gleaning the principles taught in this book."
Rev. David Ong Tiong Chuan
Pastor/Mission Director
Church of Singapore (Bukit Timah)

"I have known Ricky Sim since 1975 when I was the Senior Pastor of Faith Assembly of God. My earliest memory of him was when he was involved in the Worship Ministry of the church. Through the decades I have known him, he has been consistently involved in different activities of worship in and outside the church. Therefore, I can testify that he has a heart for God and very passionate in worship.
As I read his book, there are two main points I received: first he has zealously guarded his heart and the other is he has a passion to be scriptually based. I have seen the abundance of Bible references and worshipful songs he quoted. I believe that by reading his book you will be inspired to guard your heart to worship God."
Rev. Dr. Andrew Ong
Regular Faculty of Assemblies of God Bible College

"A true worshipper and an example of consistency is how I would describe Ricky Sim. I have known Ricky for over 20 years and even had the privilege of being his pastor for a season in Singapore. He has progressively developed himself and kept up his pursuit of God, determined to be found pleasing and approved of God in every area of his life. I have been very privileged to be able to assist Ricky in the production of this book and must say that this book provides all the essential fundamentals and divine insights to guarding our hearts. This book is an invitation for transformation and change that will result in the kind of life that pleases God and glorifies His name. This book is a must read for every believer."
Rev. Dr. Isaac Albert James
Senior Pastor
World Harvest Church Malaysia


Is happily married to his wife, Wendy for 28 years. They have been blessed with two sons, Benjamin and Timothy, now in their 20s.
He is currently worshipping at The Church of Singapore (Bukit Timah), English Service.  He plays an active role in worship leading in the services, cell and the men’s ministry. He also conducts Praise and Worship workshops and shares about the Worship Lifestyle of a believer both locally and in the South East Asia regions.
In encouraging more believers to live a Lifestyle Worshiper, he publishes his weekly blog on ‘The Praise and Worship Connection’ which is accessible to international followers on:
Ricky is also a worship songwriter. He currently has two worship albums. He shares the songs on the website:
He serves as an Advisor to The Singapore Christian Songwriters and Music – a non profit organisation. This is a platform that promotes local songwriters.
With more than 30 years experience serving the Lord in various ministries (youth leader, worship director, deacon, etc.); recently, he sensed a new direction the Lord had put in his heart to write this book to inspire Christian to remain focus on the true meaning of the heart of worship and being a worshiper that God wants them to be!
He prays that the Lord will use his book to encourage all believers to practice and know how to guard their hearts in the Christian walk.