Matthew 5:27

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. For he that is curious to behold fair countenances, is himself chiefly the enkindler of the furnace of that passion, and makes his own soul a captive, and soon proceeds also to the act. Thus we see why He said not, "whosoever shall lust to commit adultery," but, "whosoever shall look to lust." And in the case of anger He laid down a certain distinction, saying, "without a cause," and "for nought;" but here not so; rather once for all He took away the desire. Yet surely both are naturally implanted, and both are set in us for our profit; both anger, and desire: the one that we may chastise the evil, and correct those who walk disorderly; the other that we may have children, and that our race may be recruited by such successions. Why then did He not make a distinction here also? Nay, very great is the distinction which, if thou attend, thou wilt see here also included. For He said not simply, "whosoever shall desire," since it is possible for one to desire even when sitting in the mountains; but, "Whosoever shall look to lust;" that is to say, he who gathers in lust unto himself; he who, when nothing compels him, brings in the wild beast upon his thoughts when they are calm. For this comes no longer of nature, but of self-indulgence. This even the ancient Scripture corrects from the first, saying, "Contemplate not beauty which is another's." And then, lest any one should say, "what then, if I contemplate, and be not taken captive," He punishes the look, lest confiding in this security thou shouldest some time fall into sin. "What then," one may say, "if I should look, and desire indeed, but do no evil?" Even so thou art set among the adulterers. For the Lawgiver hath pronounced it, and thou must not ask any more questions. For thus looking once, twice, or thrice, thou wilt perhaps have power to refrain; but if thou art continually doing this, and kindling the furnace, thou wilt assuredly be taken; for thy station is not beyond that nature which is common to men. As we then, if we see a child holding a knife, though we do not see him hurt, beat him, and forbid his ever holding it; so God likewise takes away the unchaste look even before the act, lest at any time thou shouldest fall in act also. For he who hath once kindled the flame, even when the woman whom he hath beheld is absent, is forming by himself continually images of shameful things, and from them often goes on even to the deed. For this cause Christ takes away even that embrace which is in t

Between πάθος and προπάθεια, that is between actual passion and the first spontaneous movement of the mind, there is this difference: passion is at once a sin; the spontaneous movement of the mind, though it partakes of the evil of sin, is yet not held for an offence committedh. When then one looks upon a woman, and his mind is therewith smitten, there is propassion; if he yields to this he passes from propassion to passion, and then it is no longer the will but the opportunity to sin that is wanting. Whosoever, then, looketh on a woman to lust after her, that is, so looks on her as to lust, and cast about to obtain, he is rightly said to commit adultery with her in his heart.

(Serm. ix. 3 and 10.) Thou shalt not commit adultery, that is, Thou shalt go no where but to thy lawful wife. For if you exact this of your wife, you ought to do the same, for the husband ought to go before the wife in virtue. It is a shame for the husband to say that this is impossible. Why not the husband as well as the wife? And let not him that is unmarried suppose that he does not break this commandment by fornication; you know the price wherewith you have been bought, you know what you eat and what you drinkg, therefore keep yourself from fornications. Forasmuch as all such acts of lust pollute and destroy God's image, (which you are,) the Lord who knows what is good for you, gives you this precept that you may not pull down His temple which you have begun to be.

(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.