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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Both the PCA and the CRC have made godly decisions in line with Scripture (although at different places in the struggle for Biblical morality); continued courage and perseverance against sin will be necessary to remain and become ever more faithful churches of God.

Christians have a duty to obey God in all circumstances, regardless of the cost. This doesn’t change even if there is no institutional support, as this writer discussed several years ago. But it is better if we have a church faithful to the Word of God to be part of. In our day, faithfulness is measured by fidelity to the sexual morality revealed in Scripture. When a denomination makes its decision on this, it decides everything – whether it will continue in faithfulness to God and his gospel of salvation from sin, or whether it will follow the world and its gospel of self-actualization and gratification.
Summer is the time when Protestant denominations’ governing bodies commonly meet, and just as this has been a momentous summer for the Supreme Court, so it has been for three denominations considered Evangelical in recent decades, which met and took decisive action in one direction or another.
Other than certain differences on questions of divorce and remarriage, sexual morality was not much of an issue for churches before the sexual revolution. Even here, the standard of divorceless opposite-sex monogamy is clear from Scripture, and the general acceptance of this by a Christian society made any admonitions to sexual purity focus on avoiding the temptations of fornication and adultery. Commands against sodomy in both testaments were strong and clear, and to common sense admitted of no exceptions.
Beginning with the sexual revolution of the 1960s, and the advent of a movement for homosexual liberation, it became necessary to make binding pronouncements against homosexuality (although to previous generations the Biblical condemnations would have been quite sufficient for church discipline). What then followed was denominations with formal statements against homosexual practice  and growing minorities in vocal dissent, moved by the larger society and activist groups within the denominations. Eventual formal acceptance of homosexuality today comes in the form of formally accepting same-sex marriage. Those who disagree either leave the church or find a personal justification for remaining.
More than a year ago, this writer reviewed an excellent defense of opposite-sex only monogamy by a pastor in the Mennonite Church U.S.A., Darrin W. Synder Belousek, who offered a Biblical defense of opposite-sex only monogamy independent of the Biblical condemnations of homosexuality. Synder Belousek was concerned about the drift of his denomination toward the acceptance of same-sex marriage. Earlier the denomination’s largest conference, the Lancaster Mennonite Conference, had left the denomination, concerned about the increasing acceptance of homosexuality.
Late this spring, as was reported at the beginning of last month, the Mennonite Church U.S.A. formally accepted same-sex marriage, and signaled an utter rejection of Christian sexual morality in effectively apologizing for its previous Biblical standard, calling for repentance from it. Typical of the current homosexual/transgender apologetic, it effectively claims that the pain and humiliation Biblical morality causes is sufficient to establish that it is oppressive, setting aside God’s absolute authority, and Jesus’ call to accept the painful, narrow gate to life.
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1) Let the peace of God rule in your hearts, 2) let the word of Christ dwell in you richly, and 3) whatever you do, do all in the name of Jesus. I believe that obedience to these commands is the soil in which the spirit of thanksgiving flourishes. Obedience to these commands is the lifestyle which is most conducive to the thankful spirit.

This coming Thursday is Thanksgiving, that uniquely American holiday on which we take off from work and school, eat turkey and dressing, and watch parades and bowl games on television. But we need to remember that Thanksgiving should be more than a day off and a special meal and seasonal TV programs. Thanksgiving was instituted as a day which our culture sets aside to count our blessings and to give God thanks. Yet we must acknowledge that Thanksgiving as originally instituted is becoming more and more foreign to much of our culture. A radical form of ingratitude has come to characterize the culture that today dominates in certain spheres of our society. The philosophy behind this radical ingratitude is neo-Marxism, a new embodiment of the failed economic theories of Karl Marx.
The original version of Marxism tried to promote revolution through conflict between factory workers and the capitalist owners of the means of production. In the twentieth century, economic versions of Marxism were tried in numerous places and without exception proved to be economically disastrous. At the same time, the economic status of workers continued to improve in societies with a free market. In the closing decades of the twentieth century, socialism and communism were abandoned in many nations as failed economic experiments.
Sadly the ghost of Marxism has risen from the grave in the twenty-first century. The newer version of Marxism tries to promote revolution through conflict not between economic classes but between social classes referred to as the victims of oppression and the oppressors. Instead of promoting gratitude for the real blessings that people experience, neo-Marxism encourages people to view themselves as oppressed victims even when they are not. Neo-Marxism tries to convince people to view truly good things about our culture as sinister means used by the powerful to maintain power and to oppress their victims. To give some examples, free speech is opposed as a form of hateful violence, police protection for high crime neighborhoods is opposed as racial profiling, private ownership of defensive weapons is opposed as the cause of criminal violence, constitutional limits on government are opposed as barriers to radical social change, the traditional family is opposed as a barrier to new sexual liberties, and so on. In today’s world, things for which we should be grateful are labeled as means of oppression.
Perhaps the most tragic consequence of neo-Marxism is the current trend for young people to be dissatisfied with the biological sexual identity that God has encoded into every gene in their physical bodies. It is a sign of our times that instead of saying with the psalmist David, “I am fearfully and wonderfully made,” many young people resent the physical bodies which God has given them.
In contrast to much of our culture today, the biblically defined Christian is characterized not by an embittered ingratitude but by thanksgiving. To use the language of the hundredth Psalm, we enter into God’s gates with thanksgiving and into His courts with praise. Giving thanks to God is the Christian’s duty. In 1 Thessalonians 5:18, Paul exhorts us, “In everything, give thanks.” And consider Ephesians 5:3-4:
3 But fornication and all uncleanness or covetousness, let it not even be named among you, as is fitting for saints;
4 neither filthiness, nor foolish talking, nor coarse jesting, which are not fitting, but rather giving of thanks.
Worldly people may be known for their dirty jokes and filthy language and coarse jesting, but the Christian should be known for giving thanks to God.
I chose Colossians 3:15-17 as our passage for today because it mentions the concept of thanksgiving three times, once in each verse. This is very obvious is verses 15 and 17. Verse 15 says, “be thankful,” and verse 17 says, “giving thanks to God the Father.” The reference to thanksgiving is not as obvious in verse 16, at least not in the New King James Version, which reads, “singing with grace in your hearts to the Lord.” The reference to thanksgiving in verse 16 is obvious in some other translations. For example, the New American Standard and the English Standard Version both translate verse 16 as referring to singing “with thankfulness in your hearts to God.”
The Greek word here is usually translated “grace.” Yet like most words, this Greek word has more than one possible meaning. The meaning of this word which we are probably most familiar with is the goodwill which motivates a giver to give a gift as an undeserved and unearned favor. This is the meaning that this word has, for example, in Ephesians 2:8, which says, “For by grace you have been saved through faith.” This is a reference to grace as the goodwill which motivated God to give us the unmerited and undeserved gift of salvation. Yet this Greek word also has other related meanings. It can refer to the gift itself. It can also refer to the gratitude of the person who received the gift, to the gratitude motivated by the reception of the gift.
In verse 16 of our text, the Apostle Paul is here using the Greek word often translated “grace” to refer to the gratitude of someone on the receiving end of God’s undeserved favor. This is the possible meaning that makes the best sense of verse 16 and is also the meaning that is most consistent with verses 15 and 17, both of which mention thanksgiving.
I believe our passage for today gives us some insight into how we as Christians can maintain the spirit of thanksgiving in spite of the ingratitude that dominates so much of our culture. Our passage today consists of three verses, and each verse contains a command. The three commands are 1) let the peace of God rule in your hearts, 2) let the word of Christ dwell in you richly, and 3) whatever you do, do all in the name of Jesus. I believe that obedience to these commands is the soil in which the spirit of thanksgiving flourishes. Obedience to these commands is the lifestyle which is most conducive to the thankful spirit.
I want to look at these commands and through them exhort us to give thanks to the Lord our God.
Paul’s first command is, Let the peace of God rule in your hearts. Now notice at the onset that Paul is not talking about just any old inner peace. There are plenty of people who are at peace with themselves who should not be. Many people have hearts like the false prophets of old who cried out, “Peace, peace,” when there was no peace. The Bible describes the unregenerate heart as calloused and stony, which is a metaphorical way of saying unfeeling. Their lives are burdened with sin and with guilt and yet they feel no inner grief. They have the peace of spiritual indifference, the peace of spiritual ignorance, the peace of spiritual death. Their hearts have the peace and quiet of the graveyard.
Paul is not referring to just any old inner peace. He is referring to the peace of God. This is the peace which Jesus promised as His legacy to His people in John 14:27, where He said,
27 “Peace I leave with you, My peace I give to you; not as the world gives do I give to you. Let not your heart be troubled, neither let it be afraid.”
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