Matthew 5:28

But how far wider an extent the Lord assigns to those crimes we are sure: when He defines adultery to consist even in concupiscence, "if one shall have cast an eye lustfully on," and stirred his soul with immodest commotion; when He judges murder to consist even in a word of curse or of reproach, and in every impulse of anger, and in the neglect of charity toward a brother just as John teaches, that he who hates his brother is a murderer.

Enough, that the Lord has said faults are committed in the mind and the conscience. If concupiscence or malice have ascended into a man's heart, He saith it is held as a deed. You therefore have given a guarantee; which clearly has "ascended into your heart," which you can neither contend you were ignorant of nor unwilling; for when you gave the guarantee, you knew that you did it; when you knew, of course you were willing: you did it as well in act as in thought; nor can you by the lighter charge exclude the heavier, so as to say that it is clearly rendered false, by giving a guarantee I for what you do not actually perform.

For, when one reads of God as being "the searcher and witness of the heart; " when His prophet is reproved by His discovering to him the secrets of the heart; when God Himself anticipates in His people the thoughts of their heart, "Why think ye evil in your hearts? " when David prays "Create in me a clean heart, O God," and Paul declares, "With the heart man believeth unto righteousness," and John says, "By his own heart is each man condemned; " when, lastly, "he who looketh on a woman so as to lust after her, hath already committed adultery with her in his heart," -then both points are cleared fully up, that there is a directing faculty of the soul, with which the purpose of God may agree; in other words, a supreme principle of intelligence and vitality (for where there is intelligence, there must be vitality), and that it resides in that most precious part of our body to which God especially looks: so that you must not suppose, with Heraclitus, that this sovereign faculty of which we are treating is moved by some external force; nor with Moschion, that it floats about through the whole body; nor with Plato, that it is enclosed in the head; nor with Zenophanes, that it culminates in the crown of the head; nor that it reposes in the brain, according to the opinion of Hippocrates; nor around the basis of the brain, as Herophilus thought; nor in the membranes thereof, as Strato and Erasistratus said; nor in the space between the eyebrows, as Strato the physician held; nor within the enclosure of the breast, according to Epicurus: but rather, as the Egyptians have always taught, especially such of them as were accounted the expounders of sacred truths; in accordance, too, with that verse of Orpheus or Empedocles:

The emotions of sin, indeed, when not resulting in effects, are usually imputed to the soul: "Whosoever looketh on a woman to lust after, hath already in his heart committed adultery with her." But what has the flesh alone, without the soul, ever done in operations of virtue, righteousness, endurance, or chastity? What absurdity, however, it is to attribute sin and crime to that substance to which you do not assign any good actions or character of its own! Now the party which aids in the commission of a crime is brought to trial, only in such a way that the principal offender who actually committed the crime may bear the weight of the penalty, although the abettor too does not escape indictment.

"Whosoever looketh on a woman to lust after her, hath committed adultery with her already in his heart." Therefore, even for this cause it is most fitting that the soul, without at all waiting for the flesh, should be punished for what it has done without the partnership of the flesh.

The Lord Himself, in short, when rebuking our thoughts, includes in His censures this aspect of the flesh, (man's heart), the citadel of the soul: "Why think ye evil in your hearts? " and again: "Whosoever looketh on a woman, to lust after her, hath already committed adultery with her in his heart." So that even the thought, without operation and without effect, is an act of the flesh.

For His own servants, may the Lord by His mercy take care that to them it may be lawful even to presume on His goodness! But why are we a (source of) danger to our neighbour? why do we import concupiscence into our neighbour? which concupiscence, if God, in "amplifying the law," do not dissociate in (the way of) penalty from the actual commission of fornication, I know not whether He allows impunity to him who has been the cause of perdition to some other.

For, since he says that married persons make this their solicitude, "how to please one another" (not, of course, morally, for a good solicitude he would not impugn); and (since), he wishes them to be understood to be solicitous about dress, and ornament, and every kind of personal attraction, with a view to increasing their power of allurement; (since), moreover, to please by personal beauty and dress is the genius of carnal concupiscence, which again is the cause of fornication: pray, does second marriage seem to you to border upon fornication, since in it are detected those ingredients which are appropriate to fornication? The Lord Himself said, "Whoever has seen a woman with a view to concupiscence has already violated her in his heart." But has he who has seen her with a view to marriage done so less or more? What if he have even married her?-which he would not do had he not desired her with a view to marriage, and seen her with a view to concupiscence; unless it is possible for a wife to be married whom you have not seen or desired.

Having now finished the former commandment, and having extended it unto the height of self-denial, He, advancing in course and order, proceeds accordingly unto the second, herein too obeying the law. For beginning from those passions, which most belong to our whole race, anger, I mean, and desire (for it is these chiefly that bear absolute sway within us, and are more natural than the rest); He with great authority, even such as became a legislator, both corrected them, and reduced them to order with all strictness. For He said not that the adulterer merely is punished; but what He had done with respect to the murderer, this He doth here also, punishing even the unchaste look: to teach thee wherein lies what He had more than the scribes. Accordingly, He saith, "He that looketh upon a woman to lust after her hath already committed adultery with her:" that is, he who makes it his business to be curious about bright forms, and to hunt for elegant features, and to feast his soul with the sight, and to fasten his eyes on fair countenances. For He came to set free from all evil deeds not the body only, but the soul too before the body. Thus, because in the heart we receive the grace of the Spirit, He cleanses it out first. "And how," one may say, "is it possible to be freed from desire?" I answer, first, if we were willing, even this might be deadened, and remain inactive. In the next place, He doth not here take away desire absolutely, but that desire which springs up in men from sight. […]

Gerontius of Petra said, 'Many people who are tempted by pleasures of the flesh do not sin with the body but lust with the mind; they keep their bodily virginity but lust in their heart. It is better then, beloved, to do what is written, …

A brother asked some of the monks whether evil thoughts defiled a man. When they were asked this question, some said, 'Yes,' but some said, 'No, for if that were so, we ordinary people could not be saved. If we think of vile actions but …

She is a snare to those who look upon her; whence it is written: "Many, having admired the beauty of a strange woman, have become reprobate." It is read of blessed Bernard that his sister came to see him, adorned with the most beautiful finery; …

(Mor. xxi. 2.) But whoso casts his eyes about without caution will often be taken with the pleasure of sin, and ensnared by desires begins to wish for what he would not. Great is the strength of the flesh to draw us downwards, and the charm of beauty once admitted to the heart through the eye, is hardly banished by endeavour. We must therefore take heed at the first, we ought not to look upon what it is unlawful to desire. For that the heart may be kept pure in thought, the eyes, as being on the watch to hurry us to sin, should be averted from wanton looks.

Ye have heard that it was said, Thou shalt not commit adultery. But I say unto you, That whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart. That is, if one stands gazing and examining, kindling …

But I say unto you, that whosoever looketh on a woman,....

Whosoever looketh on a woman to lust after her - Επιθυμησαι αυτην, earnestly to covet her. The verb, επιθυμεω, is undoubtedly used here by our Lord, in the sense of coveting through the influence of impure desire. The word is used in precisely the same sense, on the same subject, by Herodotus, book the first, near the end. I will give the passage, but I dare not translate it.

These verses deserve the closest attention of all readers of the Bible. A right understanding of the doctrines they contain lies at the very root of Christianity. The Lord Jesus here explains more fully the meaning of his words, “I came not to destroy the law but to fulfil.”

These verses deserve the closest attention of all readers of the Bible. A right understanding of the doctrines they contain lies at the very root of Christianity. The Lord Jesus here explains more fully the meaning of his words, “I came not to destroy the law but to fulfil.”He teaches us that his Gospel magnifies the Law, and exalts its authority: he shows us that the Law, as expounded by him, was a far more spiritual and heart-searching rule than most of the Jews supposed; and he proves this by selecting three commandments out of the ten as examples of what he means. He expounds the sixth commandment. Many thought that they kept this part of God’s law so long as they did not commit actual murder. The Lord Jesus shows that its requirements go much further than this. It condemns all angry and passionate language, and especially when used without a cause. Let us mark this well. We may be perfectly innocent of taking life, and yet be guilty of breaking the sixth commandment! He expounds the seventh commandment. Many supposed that they kept this part of God’s law if they did not actually commit adultery. The Lord Jesus teaches that we may break it in our thoughts, hearts and imaginations, even when our outward conduct is moral and correct. The God with whom we have to do looks far beyond actions. With him even a glance of the eye may be a sin! He expounds the third commandment. Many fancied that they kept this part of God’s law so long as they did not swear falsely, and performed their oaths. The Lord Jesus forbids all vain and light swearing altogether. All swearing by created things, even when God’s name is not brought forward—all calling upon God to witness, excepting on the most solemn occasions—is a great sin. Now all this is very instructive. It ought to raise very serious reflections in our minds: it calls us loudly to use great searching of heart.