Proverbs 4:23

“Keep your heart with all diligence; for out of it are the issues of life!”

It is certainly of infinite importance that we be deeply convinced of our utter inability to do anything that is good in God’s sight, and of our entire dependence upon God for the effectual aids of his Holy Spirit. But we must not imagine, that, because we have no sufficiency of ourselves to do the will of God, we are not bound in duty to do it, or not to be exhorted and stimulated to the performance of it. Our duty is the same, whatever are the circumstances to which we have reduced ourselves; and it is in, and by, our personal exertions, that God has promised to “work all our works in us.” Hence, in the Scriptures of Truth, we are continually exhorted to serve our God in the way of his commandments. It is obvious that we cannot preserve the life of our bodies for one single moment; yet God expects that we keep ourselves from those things which would destroy life, and use all proper means of preserving it; so neither can we, of ourselves, preserve the life of our souls; yet are we bound to “keep our heart with all diligence; since out of it are the issues of life.”

It is indeed supposed here, that a new heart has been given to us; because from the unregenerated heart no good thing can issue; but inasmuch as even the renewed heart has still innumerable corruptions within it, we must keep it with all diligence.

To impress this duty on our minds, let us consider:

I. The duty enjoined.

“To keep the heart” is indeed an arduous task. To assist you in the performance of it, we will offer such suggestions as appear suitable to the occasion:

1. Fortify your heart with good principles.

An unfortified city is open to assault on every side. In the same way is the heart, if not duly fortified by the principles of true religion. As a sinner redeemed by the precious blood of Christ, and sanctified by his Spirit, I am the Lord’s peculiar property. I live by him; and I must live for him, “having been bought with a price, I am not my own, but his” who bought me; and I have nothing to do but to “glorify him with my body and my spirit, which are his.” When therefore anything attempts to gain possession of my heart, I must keep it for Him; for Him wholly; for Him alone.

Nothing is to break in upon this principle. Let earth and Hell assault me, I must oppose them in this impregnable bulwark, “Depart from me, you evil-doers; I will keep the commandments of my God! Psalm 119:115.” The Christian is furnished by God with armor for this contest, Ephesians 6:11-16; and, clothed in this panoply, he must maintain the conflict even unto death! Revelation 2:10.

2. Watch all of your heart’s most secret motions.

A citadel, however strong, if filled with traitors waiting for an occasion to open it to the enemy, needs to be guarded with peculiar care; the professed defenders of it must themselves be watched.

In the same way it is with the heart, notwithstanding it is at present garrisoned for the Lord. It is inconceivably difficult in many instances to distinguish between the loyal and the treacherous. They are both dressed in the same uniform; and both make the very same professions; both too appear actuated by the same holy zeal. The Apostles, when disputing with each other who should be the greatest, and forbidding others to cast out devils, because they followed not with them, and desiring to call fire from Heaven to avenge their Master’s cause—appeared as faithful as men could be, Luke 9:46; Luke 9:49; Luke 9:54; yet were they in reality actuated by pride and envy, in the garb of zeal and love; and, had not these corrupt passions been checked at first, who can tell, “how great a matter this little fire might have kindled! James 3:5.”

There is not a motion of the heart but must be strictly marked;
its associates must be carefully noticed;
its tendencies must be examined;
its professions must be scrutinized;
lest Satan himself be found there, under the semblance of an angel of light, 2 Corinthians 11:13-14.

3. Combine all the heart’s energies in the service of your God.

The Psalmist has a remarkable expression on this subject, “Unite my heart, O Lord, to fear your name, Psalm 86:11.” If the powers of the soul are scattered, they will be as inefficient as soldiers that are dispersed. It is by a combination of efforts for a preconcerted end, and by simultaneous movements for its accomplishment, that success is attained. The various powers of the soul must act in unison; the understanding, the will, the affections, the memory, the conscience—must all have the same object in view, each defending its proper post to the uttermost, and ready to support the other with all its might.

If, while the understanding is occupied about spiritual and heavenly things, the will and the affections are running after earthly and carnal things, what can be expected, but that the enemy shall soon gain undisguised and permanent possession of the soul? Every one knows, that “a house divided against itself, falls;” and a divided heart must become a prey to the great adversary of God and man. All its powers must center in God, if God is to inhabit it as his temple, and to possess it as his inheritance.

4. Call in for it the most effectual aid.

Human efforts, unassisted by God, will be of little avail. Indeed we can do nothing but as we are assisted by “the Captain of our Salvation, John 15:5.” To him then must we look to “strengthen us with might by his Spirit in our inward man, Ephesians 3:16;” we must go forth against our enemies, as David did against Goliath, not in dependence on an arm of flesh, but in the name of the Lord God of Israel; we must “be strong in the Lord, and in the power of his might, Ephesians 6:10.”

Then we may defy all our adversaries; we may boldly ask the greatest among them, “Who are you, O great Mountain? Before Zerubbabel you shall become a plain.” See how Paul taught the first Christians to triumph, while yet in the midst of all their conflicts, “Who shall separate us from the love of Christ? Shall tribulation, or distress, or persecution, or nakedness, or peril, or sword? No; in all these things we are more than conquerors! Romans 8:35-37” In the same way then may the weakest of us triumph, if we call in our blessed Lord to our aid; for “through Christ strengthening us, we can do all things! Philippians 4:13.”

But to form a right judgment of our duty, we must yet more distinctly notice:

II. The particular instruction relating to it.

We must:

1. keep our heart

2. with all diligence

1. That is, we must keep our heart earnestly.

It is not a slight or superficial attention to it that will suffice. The work is too great to be effected in such a way. To keep the heart from sin amidst so many temptations on every side, and to keep it in the exercise of all holy and heavenly graces, from every one of which it is by nature alienated; this is a great work indeed, and requires the utmost possible exertion on our part.

The metaphors by which the Christian’s life is set forth, sufficiently show what efforts are called for on our part.

A race is not to be won without straining every nerve.

An adversary, whether in fight or in wrestling, is not to be overcome without putting forth all our strength.

Can we then suppose, that, when our contest is not with flesh and blood only, but with all the principalities and powers of Hell, the victory can be gained without the most strenuous exertions? No; it cannot; and our Lord plainly tells us that it cannot, “Strive,” says he, “to enter in at the strait gate; for many shall seek to enter in, and not be able.” Know then, that whatever you have to do in the keeping of your heart, you must “do it with all your might.”

2. We must keep our heart constantly.

The work which we have to do, is not like that of a painter or a statuary, who may leave his work for a time, and find it afterwards in the state in which he left it; it is rather like that of one who is rolling a stone up hill, which will return upon him, as soon as ever he intermits his labor.

In the same way, our hearts of themselves are “bent to backslide from God,” ever ready to “start aside as a deceitful bow;” and Satan is ever on the watch to draw us aside. If he intermits his labors, it is in appearance only, and not in reality; for he is ever “going about, as a roaring lion, seeking whom he may devour!” His wiles and devices are innumerable; and, if once he can find us off our guard, he will assuredly avail himself of the occasion to deceive and, if possible, to destroy us.

We therefore must be always “on our watch-tower,” according to that direction of our blessed Lord, “Watch and pray, lest you enter into temptation; and, what I say unto you, I say unto all, Watch!”

3. We must keep our heart perseveringly.

There is no state at which we can arrive in this world that supersedes the necessity of continued vigilance and care. Were we as eminent as Paul himself, we must still, like him, “keep our body under control and bring it into subjection, lest by any means, after having preached to others, we ourselves become castaways.” Let our circumstances be ever so favorable, we know not but that we shall fall the very next moment.

Hezekiah was but just recovered from a dangerous illness, and that by miracle; yet when the Babylonian ambassadors came to offer him their master’s congratulations, he fell, and offended God by “the pride of his heart! 2 Chronicles 32:24-26.”

Peter also was but just descended from Mount Tabor, where he had beheld his Lord transfigured, and shining forth in all his glory, when he acted Satan’s part in dissuading his Lord from completing the work assigned him; so that he drew forth from his Divine Master that just reprimand, “Get behind me, Satan! Matthew 16:23-24.”

We may add too, that there is no wickedness so great, but we may be enticed to the commission of it. Who can reflect on David’s adultery and murder, or on Peter’s denial of his Lord with oaths and curses, and not see reason to cry continually to God, “Hold me up, and I shall be safe!”

Thus then we see, it is not enough to keep our hearts, but we must “keep them with all diligence,” engaging in the work with earnestness, and maintaining it with constancy and perseverance to the last hour of our lives.

Let us now attend to,

III. The reason with which both the one and the other are enforced.

The heart may in some respects be considered as the seat of vitality in the human body, because from thence issues the blood that circulates through the whole frame. But still more may it be said of the heart in a spiritual view, that out of it are the issues of life. For,

1. The heart is the proper source of all evil.

There are many evils to which our corrupt nature is apt to yield; some are spiritual, and some are fleshly; but the womb where all are generated, and from whence they proceed, is the heart. Adultery, and murder, and theft, with many other evils, might be supposed to arise rather out of external circumstances connected with our outward man; but they are all traced by our blessed Lord to the heart, “For from within, out of men’s hearts, come evil thoughts, sexual immorality, theft, murder, adultery, greed, malice, deceit, lewdness, envy, slander, arrogance and folly. All these evils come from inside and make a man ‘unclean.’ Mark 7:21-23.”

Now, if the heart is the fruitful spring of such evils—then ought it not to be watched? Ought it not to be kept with all diligence? It is evident that, without continual care, the whole man would soon be inundated with evil! Should we not then watch the sluices? Should we not guard the banks, and keep them in good repair? In other words, should we not do all in our power to prevent such fatal effects?

Let it never be forgotten, that the smallest breach in a bank will soon yield to the torrent, and, by its extension, bid defiance to any remedy that can be applied. Consequently, if we would not be overrun with all manner of evil, we must guard against the irruption of any. “A little leaven will soon leaven the whole lump.”

2. The heart is the proper seat of all good.

Grace is planted in the heart; it has no other residence; it may operate by the members; but its seat is in the heart. Repentance flows from thence, even from “the broken and contrite heart.” Faith has there its first formation. “With the heart man believes unto righteousness.” Love combines and concentrates all its powers, “We are to love God with all the heart;” yes, “Christ himself dwells in our hearts by faith.”

Whatever then proceeds not from the heart, is of no value; all our best services for God are no other than hypocrisy, if the heart is far from him! Matthew 15:7-8. Must we not then keep the heart with all diligence, to see that it be duly influenced by divine grace, and that all which we do is the result of gracious principles implanted there?

Truly, if “a man may give all his goods to feed the poor, and his body to be burned, and, after all, be no better than sounding brass or a tinkling cymbal,” because his actions proceed not from a principle of love in the heart—then we are called upon to watch over our hearts with all imaginable care, that they be duly stored with all that is good. This is the plain and obvious inference from what our Lord himself has distinctly affirmed in those memorable words. “The evil man out of the evil treasure of his heart brings forth that which is evil; and the good man out of the good treasure of his heart brings forth that which is good;” in both cases the produce is “from the abundance of the heart, Luke 6:45;” and “the tree is known by its fruits.”

3. By the condition of our heart, shall our state be determined in the last day.

Even in courts of judicature among ourselves, it is not so much the act, as the heart, that is the object of investigation. Murder itself is not accounted murder, if it was not attended with a purpose of heart to injure and destroy. Much more therefore may it be expected that God will inquire into the designs and purposes of our hearts, “He does not look on the outward appearance, but at the heart;” and “he searches the heart, and tries the thoughts, on purpose to give to every man according to the fruit of his doings.” For this end “he will bring to light the hidden things of darkness, and will make manifest the counsels of the heart.”

To our hearts then must we look, if ever we would give up our account with joy; for, as our hearts are, so shall we appear in his sight, Proverbs 23:7. Let us then not only search and try ourselves, but beg of God also to “search and try us, and to see if there is any wicked way in us, and to lead us in the way everlasting.”

APPLICATION.

1. Do not grudge your labor in the way to Heaven.

You cannot make any attainments in this life without labor; how then can you hope to attain the glory and felicity of Heaven without it? True it is, that Heaven is a gift of God; a gift altogether of his free and sovereign grace; but it is also true, that we must labor for it, according to that direction of our Lord, “Do not labor for food that spoils, but for food that endures to eternal life, which the Son of Man will give you, John 6:27.” Labor then with all earnestness, and constancy, and perseverance. If you are frequently foiled, still return to your post, and increase your vigilance in proportion as you discover the deceitfulness and wickedness of your hearts; and be assured, that, however great your toil may be, Heaven will be an abundant recompense for all.

2. Do not doubt but that your labor shall at last be crowned with success.

Were your success dependent on an arm of flesh, you might well despond; but your God and Savior is pledged to “carry on in you the work he has begun,” and to “perfect that which concerns you.” Your enemies may renew their assaults as often as they will; but they shall not prevail; for God has said, that “No weapon that is formed against you shall prosper! Isaiah 54:17;” and again. “The law of God is in his heart; his footsteps shall not slide! Psalm 37:31.” Go on then, “Be on your guard; stand firm in the faith; be men of courage; be strong! 1 Corinthians 16:13;” and know for your comfort what the all-gracious and unchanging God has spoken, “Do not be weary in well-doing; for in due season you shall reap, if you do not faint! Galatians 6:9.”

Charles Simeon