Our hearts are deceitful, but God knows our hearts inside out. He has made our hearts new. The labyrinth belongs to him now and he is gradually remodelling it into a beautiful place where sin cannot hide.  And if you want to know the true state of your heart, the Lord will help you. Ps 139.23f: Search me, O God, and know my heart! Try me and know my thoughts! 24And see if there be any grievous way in me, and lead me in the way everlasting!

In Proverbs 4.23 Solomon warns his son, ‘Keep your heart with all vigilance, for from it flow the springs of life.’ He goes on to give admonitions about the mouth, the eyes and the feet (vv24-27), but it is the heart that must be guarded above all else. Why?
In Scripture, the word ‘heart’ is used more than 1000 times, but it almost never refers to the physical organ inside our chests. The Theological Wordbook of the Old Testament sums up all the usages of the term in this way: it is ‘the richest, most all-encompassing biblical term for the totality of a man’s inner nature.’ The heart is said to do a wide range of things in the Bible, but all its many activities fall into one of the three main faculties of the soul: the mind, the affections and the will. It includes the mind—our thoughts, imagination, fantasies, judgments and attitudes. It encompasses the affections—our emotions, our desires and longings, our revulsions. And it describes the will—our choices, decisions and motivations.
Once we understand that the heart involves all these things, it becomes even clearer why we must guard it with all vigilance, before all else—because it is so fundamental. It is the control centre of the whole person. Indeed Scripture sometimes uses ‘heart’ as a kind of synonym for the self (e.g. Gen 18.5; Ex 9.14; 1Pt 3.4: ‘…the hidden person of the heart’.)
We also need to guard our hearts with all vigilance because they are under constant attack. From the world and the devil outside ourselves of course, but also—most dangerously of all—from an enemy within: the flesh—a traitor inside our own hearts, a Judas looking for an opportune moment to hand us over to sin. The heart is deceitful above all things, and desperately sick; who can understand it? (Jer 17.9). It is like an unsearchable labyrinth, with endless twists and turns, blind alleys and dark corners where the Minotaur of our indwelling sin lurks in wait for us.
We need to guard our hearts too because the Lord wants our hearts. Prov 23.6: My son, give me your heart. What a beautiful and powerful incentive this is! We are keeping our hearts for our Father! We wouldn’t be satisfied with a marriage where our spouse was dutiful and faithful outwardly, but longed inwardly to be with someone else to whom their heart belonged. Why would God be content with that from us? He wants our hearts—our minds, our affections and our wills. The totality of our inner nature and not just our outward behaviour. Isa 29.13: And the Lord said: “…this people draw near with their mouth and honor me with their lips, while their hearts are far from me… Ps 51.16f: For you will not delight in sacrifice, or I would give it; you will not be pleased with a burnt offering. The sacrifices of God are a broken spirit; a broken and contrite heart, O God, you will not despise.
How then do we do this vital work of guarding our hearts? The first step is to do a ‘spiritual MRI scan’ of our hearts. We need to know the current state of our hearts so that we can address the problems and weaknesses we find. Rom 12.3 tells us to ‘think [of ourselves] with sober judgment.’ The Puritan John Flavel, in an exposition of Prov 4.23, wrote these challenging words: ‘Some people have lived forty or fifty years and have had scarcely one hour’s discourse with their own hearts! … Of all works in religion, this is the most difficult, constant and important work. Heart work is indeed hard work. To shuffle over religious duties with a loose and heedless spirit will cost no great pains. But to set yourself before the Lord and tie up your loose and vain thoughts to a constant and serious attention upon him, this will cost you something.’ John Owen in his book The Mortification of Sin advises his readers: “Be acquainted, then, with thine own heart: though it be deep, search it; though it be dark, inquire into it; though it give all its distempers other names than what are their due, believe it not.”
As we carry out this spiritual MRI scan of our hearts we need to bear in mind what the heart is—the totality of our inner nature: the mind, will and affections. We need to assess all three areas of the heart with probing diagnostic questions. Here are some examples of what that might look like:
A. The mind (thoughts, attitudes, imagination, plans, judgments, discernment).
a) What do you think about? Do you think about spiritual things? The glory of God? The Person and work of Jesus Christ? The Gospel of grace? Sinclair Ferguson once asked the unsettling question, ‘How many Christians today could sit in a room without any resources and think about Jesus Christ for more than five minutes before they run dry?’
b) What do you think about when you’re not focused on specific tasks? John Owen calls these ‘Natural, voluntary thoughts’. They’re like the screensaver that comes up on our computer screens. When the computer is idling for more than a few minutes, it’s the image that appears. What images appear in your mind when it’s not actively engaged in a particular task? Owen says, ‘These thoughts give the best measure of the frame of our minds and hearts… such as the mind of its own accord is apt for, inclines & ordinarily betakes itself unto.’ In other words, do you think about spiritual things when you’re not forced to because you’re listening to a sermon in church or taking part in a Bible study?
c) Owen also asks, do you abound in spiritual thoughts? What proportion of your thoughts are spiritual compared to your thoughts about other things? Here’s a very challenging way of asking the question: do spiritual thoughts ever distract you when you’re engaged in other pursuits? We all know what it’s like to be distracted by earthly thoughts intruding when we’re trying to pray or read the Bible in our daily devotions or listen to a sermon, but is it ever the other way around? Do you ever find yourself thinking about the Lord Jesus when you’re in the middle of watching a film or a football match?
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The Lord does, in fact, produce the new birth in all who believe in Jesus; and their believing is the surest evidence that they are born again. We trust in Jesus for what we cannot do ourselves: if it were in our own power, what need of looking to Him? It is ours to believe, it is the Lord’s to create us anew. He will not believe for us, neither are we to do regenerating work for Him. 

I have been doing a great deal of research in preparation for the writing of my next book which is a commentary on Paul’s Epistle to the Romans. Much of that research had to do with listening to some preachers who seem to do everything they can to avoid actually preaching about anything having to do with the Gospel of our Lord Jesus Christ or anything that is based in solid Biblical doctrine. The visible church in our time is quickly taking on the shape of the counterfeit Church we see in the book of Revelation. However, for this post, I will be using a chapter from All of Grace by Charles Spurgeon. The chapter’s title is “Regeneration and the Holy Spirit.” Enjoy and be blessed – Mike Ratliff
7 Do not marvel that I said to you, ‘You must be born again.’John 3:7 (LSB)
44 No one can come to Me unless the Father who sent Me draws him; and I will raise him up on the last day. John 6:44 (LSB)
YE MUST BE BORN AGAIN.” This word of our Lord Jesus has appeared to flame in the way of many, like the drawn sword of the cherub at the gate of Paradise. They have despaired, because this change is beyond their utmost effort. The new birth is from above, and therefore it is not in the creature’s power. Now, it is far from my mind to deny, or ever to conceal, a truth in order to create a false comfort. I freely admit that the new birth is supernatural, and that it cannot be wrought by the sinner’s own self. It would be a poor help to my reader if I were wicked enough to try to cheer him by persuading him to reject or forget what is unquestionably true.
But is it not remarkable that the very chapter in which our Lord makes this sweeping declaration also contains the most explicit statement as to salvation by faith? Read the third chapter of John’s Gospel and do not dwell alone upon its earlier sentences. It is true that the third verse says:
Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.
But, then, the fourteenth and fifteenth verses speak:
And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up: that whosoever believeth in him should not perish, but have eternal life.The eighteenth verse repeats the same doctrine in the broadest terms:
He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God.
It is clear to every reader that these two statements must agree, since they came from the same lips, and are recorded on the same inspired page.
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Are you amazed by the glorious magnificence and power of God? God can feel abstract to us. Mediating on God’s perfections, such as his glory, helps us worship and know him better. Our contemplations do not require us to empty our minds but to seek truth and consider it deeply. We see God’s attributes throughout the Scriptures. They are like facets of a diamond—his goodness, mercy, sovereignty, wisdom, immutability, eternal nature, and providence—each as stunning as the next. 

I’ll never forget the day I visited the Cliffs of Moher on the west coast of Ireland—breathtaking precipices towering over the vast, wild Atlantic. A chilly breeze carried mist off the ocean. The haunting Irish tunes from a nearby busker’s pennywhistle. Awesome. Unforgettable. A painting, photo, or video could never capture the moment. These words fail.
You’ve undoubtedly had your own “I’ll never forget the day” moments. We marvel at the world’s spectacles, from the Great Barrier Reef to the Grand Canyon to the Giant’s Causeway. From Uluru to Table Mountain. From Everest to the Amazon. David, the king of old, sang of the majesty of the natural realm in Psalm 19. He marveled at how creation pointed to its Creator and proclaimed his handiwork. When we experience an awe-inspiring panorama or constellation, it is a hint, spark, or glimpse of the glory of God.
A Divine Revelation
A few privileged souls have seen divine earthly splendours—and been eyewitnesses of God’s glory. Imagine the overwhelming wonder Peter, James, and John felt when they experienced the transfiguration (Lk 9:28–36). They had gone up the mountain to pray. Jesus was metamorphosed before their eyes. At the time, they were terrified. Dread filled them. They had a peek into the nature of the afterlife—Jesus discussing his imminent crucifixion, resurrection, and ascension with two super-prophets who had returned from life beyond death. Never in their wildest dreams did they expect to hear the voice of Yahweh (the LORD) and live.
Jesus’ face blazed like the sun. His clothes dazzled like lightning. It is no wonder they were awestruck. Decades later, John wrote of what they had seen on that mountain—the brilliant radiance surrounding God’s presence (John 1:14, 1 John 1)[1]. Peter marveled that they were witnesses of Jesus’ majesty (2 Pet 1:16–18). Towards the end of the first century, Jesus appeared in glory to the exiled aged John (Rev 1:13–16). The apostle’s prophetic vision chronicles how Christ will return in grandeur to judge the living and the dead.
 Are You Amazed by the Glory of God?
When we consider these narratives, we are humbled by the glory of God.
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