by John Piper –
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Ephesians 4:17-21
This I say therefore, and affirm together with the Lord, that you walk no longer just as the Gentiles also walk, in the futility of their mind, being darkened in their understanding, excluded from the life of God, because of the ignorance that is in them, because of the hardness of their heart; and they, having become callous, have given themselves over to sensuality, for the practice of every kind of impurity with greediness. But you did not learn Christ in this way, if indeed you have heard him and have been taught in him, just as truth is in Jesus.
We begin this morning a series of eleven messages based on Paul’s letter to the Ephesians, 4:17 through 5:20. There are two reasons that I felt constrained to preach from this portion of Scripture.
Two Reasons for This Series
One is that many of us have sensed the need to ponder the significance of our faith in the area of personal relationships and related practical matters. Do we treat each other the way Christians should?
The other reason is that I am deeply convinced that the upshot of the 17 messages on hope from last spring and summer should be a new way of life in all its most ordinary parts. That’s what this portion of Scripture is about. The sermons will have titles like, “Speak Truth with Your Neighbor,” “A Small Place for Anger,” “Don’t Steal, Work and Give,” “Make Your Mouth a Means of Grace,” “Be Kind to One Another,” and so on.
What About Larger Social and Global Issues?
I think it would be a fair question if someone were to ask, “Why do you focus our attention on such small, personal matters when there are large social and global issues to be concerned about? What about racial unrest in South Africa, and religious oppression in Russia and eastern Europe, and war in the Middle East, and the export of terrorism, and the threat of AIDS, and the almost forgotten hunger and refugee problems, and the elections on Tuesday?
My answer would not be antagonistic, because I really believe that the Christian message of salvation in Christ does have something to say about every problem the world faces. I would simply say two things:
1. The More Common Application in the New Testament
When you read the New Testament, what you find is that by and large (though not exclusively: cf., e.g., Romans 13:1–7) God inspired the writers to apply the great doctrinal truths of his Word to the most ordinary personal matters and daily relationships of family and work and neighbors.
I got a good letter from one of our members this week in which he said, “Theology is not optional or a toy. It is intensely practical. My view of God will determine how I live every day. It will determine how I respond when my computer crashes.” That’s absolutely right, and biblical preaching will reflect this emphasis.
2. The Humbling Scrutiny of the Word
The other thing I would say is that the reason for this personal focus in the New Testament is probably because on the one hand it is fairly easy to be a crusader for a distant cause, say in South Africa or Central America, and yet at the same time be a very self-exalting, corrupt, and God-belittling person. But on the other hand it is very hard to endure the personal, practical scrutiny of New Testament commands about our eating habits and sexual habits and the way we use our tongue and our money—it’s hard for us to stand under this kind of moral searchlight and not be humbled by the corruption of our hearts and feel the need for a deep work of renovation in our very nature.
And wouldn’t you agree that the message of Scripture is that what the world needs most—from South Africa to Central America and from Libyan terrorism to Russian oppression—is the supernatural, spiritual renovation of human hearts? For Jesus said in Matthew 15:19, “Out of the heart come evil thoughts,” thoughts like atheistic oppressions, and racial degradation, and calculated terrorism—”out of the heart come evil thoughts, murder, adultery, fornication, theft, false witness, slander.” And therefore the world is full of futility, because hard and darkened hearts have not been renovated. And so that is where our very practical text begins today.
A Penetrating Analysis of the Human Heart’s Futility
It begins with a very penetrating analysis of the hardness and darkness and ignorance and corruption and futility of the human heart. Why does he do this? Because it’s so important that the root of our problem be recognized. There is no point in going on in this text and telling people how to manage their anger (4:26) and their money (4:28) and their sexuality (5:3) and their time (5:16) and their tongue (4:29) if you don’t help them to know and heal the disease that turns all these things into futility.
If we want to escape from futility in the practical affairs and relationships of our daily lives, we have to first of all become deep people—people who look deeply within ourselves for the cause of our futility, and who don’t settle for quick fixes and superficial, upbeat attitude changes. We don’t want the surgeon to keep back anything! Tell us everything you found, God! We want to be healed. We want to be free from the very root of futility.
So in 4:17–19 we get the surgeon’s report on the human heart.
Now this I affirm and testify in the Lord, that you must no longer live [literally: walk] as the Gentiles do, *in the futility of their minds; they are darkened in their understanding, alienated from the life of God because of the ignorance that is in them, due to their hardness of heart; they have become callous and have given themselves up to licentiousness, greedy to practice every kind of uncleanness.
(* NOTE: these readers were once among this number; in fact, 2:3 says we were ALL among this number; in other words, apart from the renovation that Christ brings, what we read here is the universal condition of the human heart)
This is what God sees when he looks into the human heart. Until we see this clearly and agree that this is what we are by nature, we probably will be healed very lightly and very superficially, and the disease will break out more easily, and we will wonder why our external clean up operations so consistently fail. We haven’t seen the real disease and haven’t severed the root of our futility.
Six Levels of Evil in the Heart
As I have meditated on these three verses I have seen six levels of evil in my own heart that stand in opposition to Christ and the work he is doing.
1. Hardness
First, the deepest problem is hardness (v. 18 at the end): “due to their hardness of heart.” My deepest problem in life is that apart from the free and sovereign grace of God my heart is hardened against God. I am like a stone toward all that is spiritual. It does not move me, attract me, delight me. This is a far deeper problem than ignorance. It is the cause of ignorance, and the guilt of ignorance.
Do you see this in the last two phrases of verse 18? “The ignorance that is in them, due to their hardness of heart.” The hardness is deeper than ignorance. And therefore my ignorance of spiritual things is not innocent. It is evil. It is blameworthy, because it comes not from lack of truth or evidence, but from a deep hardness in my heart against God. That is the first and deepest problem that the surgeon shows me about myself and why my life is so futile.
2. Darkness
Second, there is in me a deep darkness that swallows up my understanding, and keeps me from seeing the glory of the gospel or the excellency of Christ (v. 18 at the very beginning): “they are darkened in their understanding.” Notice 5:8: “Once you were darkness, but now you are light in the Lord; walk as children of the light.” Before the Lord shined in my heart, I was darkness (2 Corinthians 4:4–6). There was no light in me. And Jesus said in John 3:20 that I would not come to the light because I hated the light. And this is true whether I am a college professor or an illiterate native.
3. Deep Ignorance
Third, the result of this darkness is a deep ignorance of reality (v. 18): “alienated from the life of God because of the ignorance that is in them.” I say it is a DEEP ignorance, for there is a superficial knowledge in the darkened mind of man. Apart from spiritual light I can know ten thousand things, but I can’t know the true meaning of anything—not one thing. Because to know the meaning of a thing is to know why it exists. But Colossians 1:16 says, “All things were created through Christ and for Christ.” So until I know in my heart that every molecule in this universe exists for the sake of Jesus Christ, I don’t know the final meaning of anything. I misunderstand everything, until the darkness of my mind is taken away.
4. Licentiousness
Fourth, the hardness and darkness and ignorance of my heart results in licentiousness. Verse 19: “They have become callous [which is the same as 'hard'] and have given themselves up to licentiousness.” The sense of the passage seems to be that when a person is ignorant of the true meaning of things, and the true values of life as God sees them, that person will make his goal in life something other than God. It may be the gratification of his body in sex or drink or drugs or food. Or it may be the gratification of his ego with more refined intellectual and cultural pursuits. Anything but God, and everything apart from God. The heart that is hard and dark and ignorant of God will also be a licentious and covetous heart.
5. Uncleanness
Fifth, inevitably the hardness and darkness and ignorance and licentiousness spill over into practices of uncleanness. Notice how verse 19 ends: “greedy to practice every kind of uncleanness.” Literally, their covetousness drives them to pursue practices that in God’s eyes are impure.
So we have finally reached the level of outward behavior, or what verse 17 calls “walking” or “living”—”don’t walk as the Gentiles do, in the futility of their minds.” In other words, Escape from futility! Live a different way. Walk a different path.
But now that we have read the surgeon’s report in verses 17, 18, and 19, we know that the disease is massive. The cancer of hardness and darkness and ignorance and licentiousness has spread everywhere. And we will never be healed, we will never escape from futility by means of a psychological quick fix or a superficial, up-beat seminar on how to change our attitude. That’s man’s way, not God’s way.
6. Alienated from the Life of God
God has a way. But that leads to the sixth level of evil in my disease that I haven’t mentioned yet. Verse 18 says I am “alienated from the life of God because of the ignorance that is in me, due to my hardness of heart.” Hardness and darkness and ignorance and licentiousness and the practice of uncleanness cut me off from the one thing that could save me—the “life of God,” and leave me dead (2:1, 5).
What Is the Escape from Futility?
But even though there is no man or woman or book or seminar or program that can save me from the disease and futility of my own deep depravity, God can. It IS possible not to live in futility. That’s what Paul assumes when he says in verse 17: “Now this I affirm and testify in the Lord, that you must no longer live as the Gentiles do, in the futility of their minds.” There is an escape from futility!
What is it? He begins his answer in verses 20–21. The reason, he says, that you must not follow the Gentiles in futility is that, “You did not so learn Christ [then he mentions what he is assuming!], assuming that your have heard of him [literally: not 'heard OF' but 'heard': assuming you have heard him] and were taught in him, as the truth is in Jesus.”
What is the escape from futility this morning? It is hearing the voice of Jesus and being taught by him (verse 21). If you have heard him and if you have been taught by him, you need not and you must not walk in futility. Jesus said, “The hour is coming, AND NOW IS, when the dead will hear the voice of the Son of God, and those who hear will live” (John 5:25). No longer alienated from the life of God. Jesus Christ has spoken this morning in the truth of his Word. He has diagnosed our disease, and now he gives himself as a cure and as a teacher to everyone who hears his voice and becomes his pupil.
On another occasion he said, “My sheep hear my voice and I know them and they follow me; and I give them eternal life” (John 10:16). If you hear the voice of Jesus this morning, and not just my voice, and if you follow him (like a sheep follows a shepherd), then you will no longer be alienated from the life of God. Nothing will be futile for you any more. He will make you live forever in the presence of God and every detail of your ordinary life will have meaning in him.
The text ends with these great words: “The truth is in Jesus.” And Jesus said, “The truth will make you free.” Free from hardness and darkness and ignorance and licentiousness and uncleanness and alienation. The truth shall set you free from futility. And the truth is in Jesus. The door to his hospital and to his school is open this morning. And I urge you in his name, become his trusting patient and become his eager pupil.
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Used by permission: John Piper. © Desiring God. Website: desiringGod.org

Chrysostom’s Homily on Ephesians 4:17
“This I say therefore, and testify in the Lord, that ye no longer walk as the Gentiles also walk, in the vanity of their mind, being darkened in their understanding.”
It is the duty of the teacher to build up and restore the souls of his disciples, not only by counseling and instructing them, but also by alarming them, and delivering them up to God. For when the words spoken by men as coming from fellow-servants are not sufficient to kindle the soul, it then becomes necessary to make over the case to God. This accordingly Paul does also; for having discoursed concerning lowliness, and concerning unity, and concerning our duty not to rise up one against another, hear what he says. “This I say therefore, and testify in the Lord, that ye no longer walk as the Gentiles also walk.” He does not say, “That ye henceforth walk not as ye are now walking,” for that expression would have struck too hard. But he plainly indicates the same thing, only he brings his example from others. And so in writing to the Thessalonians, he does this very same thing, where he says, “Not in the passion of lust, even as the Gentiles which know not God.” (1 Thess. iv. 5.) Ye differ from them, he means to say, in doctrine, but that is wholly God’s work: what I require on your path is the life and the course of behavior that is after God. This is your own. And I call the Lord to witness what I have said, that I have not shrunk, but have told you how ye ought to walk.
“In the vanity,” saith he, “of their mind.”
What is vanity of mind? It is the being busied about vain things. And what are those vain things, but all things in the present life? Of which the Preacher saith, “Vanity of vanities, all is vanity.” (Eccles. i. 2.) But a man will say, If they be vain and vanity, wherefore were they made? If they are God’s works, how are they vain? And great is the dispute concerning these things. But hearken, beloved: it is not the works of God which he calls vain; God forbid! The Heaven is not vain, the earth is not vain,—God forbid!—nor the sun, nor the moon and stars, nor our own body. No, all these are “very good.” (Gen. i. 31.) But what is vain? Let us hear the Preacher himself, what he saith; “I planted me vineyards, I gat me men singers and women singers, I made me pools of water, I had great possession of herds and flocks, I gathered me also silver and gold, and I saw that these are vanity.” (Eccles. ii. 4–8.) And again, “Vanity of vanities, all things are vanity.” (Eccles. xii. 8.) Hear also what the Prophet saith, “He heapeth up riches, and knoweth not who shall gather them.” (Ps. xxxix. 6.) Such is “vanity of vanities,” your splendid buildings, your vast and overflowing riches, the herds of slaves that bustle along the public square, your pomp and vainglory, your high thoughts, and your ostentation. For all these are vain; they came not from the hand of God, but are of our own creating. But why then are they vain? Because they have no useful end. Riches are vain when they are spent upon luxury; but they cease to be vain when they are “dispersed and given to the needy.” (Ps. cxii. 9.) But when thou hast spent them upon luxury, let us look at the end of them, what it is;—grossness of body, flatulence, pantings, fullness of belly, heaviness of head, softness of flesh, feverishness, enervation; for as a man who shall draw into a leaking vessel labors in vain, so also does the one who lives in luxury and self-indulgence draw into a leaking vessel. But again, that is called “vain,” which is expected indeed to contain something, but contains it not;—that which men call empty, as when they speak of “empty hopes.” And generally that is called “vain,” which is bare and purposeless, which is of no use. Let us see then whether all human things are not of this sort. “Let us eat and drink, for tomorrow we die.” (1 Cor. xv. 32.) What then, tell me, is the end? Corruption. Let us put on clothing and raiment. And what is the result? Nothing. Such are the lives of the Greeks. They philosophized, but in vain. They made a show of a life of hardship, but of mere hardship, not looking to any beneficial end, but to vainglory, and to honor from the many. But what is the honor of the many? It is nothing, for if they themselves which render the honor perish, much more does the honor. He that renders honor to another, ought first to render it to himself; for if he gain not honor for him self, how can he ever render it to another? Whereas now we seek even honors from vile and despicable characters, themselves dishonorable, and objects of reproach. What kind of honor then is this? Perceive ye, how that all things are “vanity of vanities”? Therefore, saith he, “in the vanity of their mind.”
But further, is not their religion of this sort, wood and stone? He hath made the sun to shine for a lamp to light us. Who will worship his own lamp? The sun supplies us with light, but where he cannot, a lamp can do it. Then why not worship thy lamp? “Nay,” one will say, “I worship the fire.” Oh, how ridiculous! So great is the absurdity, and yet look again at another absurdity. Why extinguish the object of thy worship? Why destroy, why annihilate thy god? Wherefore dost thou not suffer thy house to be filled with him? For if the fire be god, let him feed upon thy body. Put not thy god under the bottom of thy kettle, or thy cauldron. Bring him into thy inner chambers, bring him within thy silken draperies. Whereas not only dost thou not bring him in, but if by any accident he has found entrance, thou drivest him out from every place, thou callest everybody together, and, as though some wild beast had entered, thou weepest and wailest, and callest the presence of thy god an overwhelming calamity. I have a God, and I do all I can to enshrine Him in my bosom, and I deem it my true bliss, not when He visits my dwelling, but when I can draw Him even to my heart. Do thou too draw the fire to thine heart. This is folly and vanity. Fire is good for use, not for adoration; good for ministration and for service, to be my slave, not to be my master. It was made for me, not I for it. If thou art a worshiper of fire, why recline upon thy couch thyself, and order thy cook to stand before thy god? Take up the art of cookery thyself, become a baker if thou wilt, or a coppersmith, for nothing can be more honorable than these arts, since these are they that thy god visits. Why deem that art a disgrace, where thy god is all in all? Why commit it to thy slaves, and not be ambitious of it thyself? Fire is good, inasmuch as it is the work of a good Creator, but it is not God. It is the work of God, it was not called God. Seest thou not how ungovernable is its nature;—how when it lays hold on a building it stops nowhere? But if it seizes anything continuous, it destroys all; and, except the hands of workmen or others quench its fury, it knows not friends nor foes, but deals with all alike. Is this then your god, and are ye not ashamed? Well indeed does he say, “in the vanity of their mind.”
But the sun, they say, is God. Tell me, how and wherefore. Is it that he sheds abundance of light? Yet dost thou not see him overcome by clouds, and in bondage to the necessity of nature, and eclipsed, and hidden by the moon? And yet the cloud is weaker than the sun; but still it often gains the mastery of him. And this indeed is the work of God’s wisdom. God must needs be all sufficient: but the sun needs many things; and this is not like a god. For he requires air to shine in, and that, too, thin air; since the air, when it is greatly condensed, suffers not the rays to pass through it. He requires also water, and other restraining power, to prevent him from consuming. For were it not that fountains, and lakes, and rivers, and seas, formed some moisture by the emission of their vapors, there would be nothing to prevent an universal conflagration. Dost thou see then, say ye, that he is a god? What folly, what madness! A god, say ye, because he has power to do harm. Nay, rather, for this very reason is he no god, because where he does harm he needs nothing; whereas, where he does good, he requires many things besides. Now to do harm, is foreign to God’s nature; to do good, is His property. Where then the reverse is the case, how can he be God? Seest thou not that poisonous drugs injure, and need nothing; but when they are to do good, need many things? For thy sake then is he such as he is, both good, and powerless; good, that thou mayest acknowledge his Lord; and powerless, that thou mayest not say that he is lord. “But,” say they, “he nourishes the plants and the seeds.” What then, at that rate is not the very dung a god? for even that also nourishes. And why not at that rate the scythe as well, and the hands of the husbandman? Prove to me that the sun alone does the work of nourishing without needing the help of either earth, or water, or tillage; but let the seeds be sown, and let him shed forth his rays, and produce the ears of corn. But now if this work be not his alone, but that of the rains also, wherefore is not the water a god also? But of this I speak not yet. Why is not the earth too a god, and why not the dung, and the hoe? Shall we then, tell me, worship all? Alas, what trifling! And indeed rather might the ear of corn be produced without sun, than without earth and water; and so with plants and all other things. Were there no earth, none of these things could ever appear. And if any one, as children and women do, were to put some earth into a pot, and to fill up the pot with a quantity of dung, and to place it under the roof, plants, though they may be weak ones, will be produced from it. So that the contribution of the earth and of the dung is greater, and these therefore we ought to worship rather than the sun. He requires the sky, he requires the air, he requires these waters, to prevent his doing harm, to be as bridles to curb the fierceness of his power, and to restrain him from letting loose his rays over the world, like some furious horse. And now tell me, where is he at night? Whither has your god taken his departure? For this is not like a god, to be circumscribed and limited. This is in fact the property of bodies only. But, say they, there is some sort of power residing in him, and he has motion. Is this power then, I pray you, itself God? Why then is it insufficient in itself, and why does it not restrain the fire? For again, I come to the same argument. But what is that power? Is it productive of light, or does it by the sun give light, though of itself possessing none of these qualities? If so, then is the sun superior to it. How far shall we unwind this maze?
Again, what is water? is not that too, they say, a god? This again is a matter of truly absurd disputation. Is that not a god, they say, which we make use of for so many purposes? And so again, in like manner, of the earth. Truly “they walk in the vanity of their mind, being darkened in their understanding.”
But these words he is now using concerning life and conduct. The Greeks are fornicators and adulterers. Of course. They who paint to themselves such gods as these, will naturally do all these things; and if they can but escape the eyes of men, there is no one to restrain them. For what will avail the argument of a resurrection, if it appear to them a mere fable? Yea, and what that of the torments of hell?—they too are but a fable. And mark the Satanic notion. When they are told of gods who are fornicators, they deny that these are fables, but believe them. Yet whenever any shall discourse to them of punishment, “these,” they say, “are poets, men who turn everything into fable, that man’s happy condition may be on all sides overturned.”
But the philosophers, it is said, discovered something truly grand, and far better than these. How? They who introduced fate, and who tell us that nothing is providential, and that there is no one to care for anything, but that all things consist of atoms? Or, others again who say that God is a body? Or who, tell me, are they? Are they those who would turn the souls of men into the souls of dogs, and would pervade mankind that one was once a dog, and a lion, and a fish? How long will ye go on and never cease trifling, “being darkened in the understanding”? for they say and do all things as though they were indeed in the dark, both in those things which concern doctrine, and those which concern life and conduct; for the man who is in darkness sees none of the things which lie before him, but oftentimes when he sees a rope, he will take it for a live serpent; or again, if he is caught by a hedge, he will think that a man or an evil spirit has hold of him, and great is the alarm, and great the perturbation. Such as these are the things they fear. “There were they in great fear,” it saith, “where no fear was” (Ps. liii. 5.); but the things which they ought to fear, these they fear not. But just as children in their nurses’ arms thrust their hands incautiously into the fire, and boldly into the candle also, and yet are scared at a man clothed in sackcloth; just so these Greeks, as if they were really always children, (as some one also amongst themselves has said, the Greeks are always children,) fear those things that are no sins, such as filthiness of the body, the pollution of a funeral, a bed, or the keeping of days, and the like: whereas those which are really sins, unnatural lust, adultery, fornication, of these they make no account at all. No, you may see a man washing himself from the pollution of a dead body, but from dead works, never; and, again, spending much zeal in the pursuit of riches, and yet supposing the whole is undone by the crowing of a single cock. “So darkened are they in their understanding.” Their soul is filled with all sorts of terrors. For instance: “Such a person,” one will say, “was the first who met me, as I was going out of the house”; of course ten thousand evils must certainly ensue. At another time, “the wretch of a servant in giving me my shoes, held out the left shoe first,”—terrible mishaps and mischiefs! “I myself in coming out set forth with the left foot foremost”; and this too is a token of misfortune. And these are the evils that occur about the house. Then, as I go out, my right eye shoots up from beneath. This is a sure sign of tears. Again the women, when the reeds strike against the standards, and ring, or when they themselves are scratched by the shuttle, turn this also into a sign. And again, when they strike the web with the shuttle, and do it with some vehemence, and then the reeds on the top from the intensity of the blow strike against the standards and ring, this again they make a sign, and ten thousand things besides, deserving of ridicule. And so if an ass should bray, or a cock should crow, or a man should sneeze, or whatever else may happen, like men bound with ten thousand chains, or, as I was saying, like men confined in the dark, they suspect everything, and are more slavish than all the slaves in the world.
But let it not be so with us. But scorning all these things, as men living in the light, and having our citizenship in Heaven, and having nothing in common with earth, let us regard but one thing as terrible, that is, sin, and offending against God. And if there be not this, let us scorn all the rest, and him that brought them in, the Devil. For these things let us give thanks to God. Let us be diligent, not only that we ourselves be never caught by this slavery, but if any of those who are dear to us have been caught, let us break his bonds asunder, let us release him from this most bitter and contemptible captivity, let us make him free and unshackled for his course toward Heaven, let us raise up his flagging wings, and teach him to be wise for life and doctrine’s sake. Let us give thanks to God for all things. Let us beseech Him that He will not declare us unworthy of the gifts offered to us, and let us ourselves withal endeavor to contribute our own part, that we may teach not only by speaking, but by acting also. For thus shall we be able to attain His unnumbered blessings, of which God grant we may all be counted worthy, in Christ Jesus our Lord with whom, to the Father and the Holy Ghost together, be glory, might, and honor, now, henceforth, and for ever and ever. Amen.