What did Jesus say about adultery?

Let one instance suffice out of the seven occasions in that discourse when our Lord said, “I say to you.” “Ye have heard that it was said of them of old time, Thou shalt not commit adultery: but I say to you, That whosoever looks on a woman to lust after her has committed adultery with her already in his heart” (Matt. 5:27-28). Where is there the setting aside of the law? Nay, He upheld it. The law was content to forbid the actual act, the Lord went further, and not only forbad the outward act, but the inward desire.

As violence then was judged and excluded in any shape for the disciples, so was impurity. The avoidance of the extreme act might satisfy a Pharisee or Scribe; but the Lord could not dispense with anything short of truth in the inward parts. To look at a woman lustfully was to commit adultery with her already in his heart; and it is not the outside only that God regards but the heart above all. It is only a new nature that delights in holiness; and he who has it by grace answers to the will of God his Father; and abhors himself if he slip even into a wrong look, as unworthy of his calling and hateful to Him who loves him.

But the Lord follows up His stringent condemnation by the call to deal promptly and unreservedly with anything that acted as an incentive. Therefore He specifies that which is part of ourselves, and when rightly used of the greatest value. Not even the right eye, or the right foot, can be allowed in presence of His displeasure which the saint fears, because he is a believer and God's child; as the Lord said elsewhere, "Be not afraid of those that kill the body, and after that have no more that they can do. But I will tell you whom ye shall fear. Fear him who, after he hath killed the body, hath power to cast into hell; yea, I say to you, Fear him." It is not the highest motive, but it is an imperative and most solemn and urgent appeal.

But there is another thing besides violence: there is the corrupt element in the heart of man — the heart lusting for that which it has not. This is taken up in the next word of our Lord: "Ye have heard that it was said by them of old time, 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. And if thy right eye offend thee, pluck it out and cast it from thee … And if thy right hand offend thee, cut it off, and cast it from thee: for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into hell" (vers. 27-30). That is, whatever in our walk, or in our ways, or in our service, whatever it might be that exposes a soul to the danger of yielding to these unholy feelings, should never be spared, but departed from at any cost. There must be the excision of everything that is hurtful to the soul; the members of the body, such as the eye desiring and the hand which would take, being used as showing the various ways in which the heart might be entangled. The cutting off of these members sets forth a heart thoroughly exercised in self-judgment; not prompted to excuse itself by saying that it had not actually committed the sin, but whatever exposed to it must be given up.

The Lord then denounces the easy dissolution of the tie of marriage: "It hath been said, Whosoever shall put away his wife, let him give her a writing of divorcement. But I say unto you, that whosoever shall put away his wife, saving for the cause of fornication, causeth her to commit adultery: and whosoever shall marry her that is divorced committeth adultery" (vers. 31, 32). Thus our Lord shows that though there might be serious difficulties, still this human relationship receives the strong sanction of God's ordinance. Though an earthly relationship, the light of heaven is thrown upon it, the sanctity of marriage held up, and the possibility of allowing anything to interfere with its holiness entirely put down by Christ, save only where there was that which interrupted it in the sight of God, in which case the act of separation would be only a declaration of its being already actually broken.

However, the Lord's answer to this is most penetrating. Moses had allowed this because of the hardness of their hearts, but from the beginning it was not so. How clearly this shows that the law itself was not at all the manifestation of God's heart! In this case law was more permissive than is the grace of God! For grace enables one to surmount difficulties in a way that law could never do.

Therefore, confirming what was implicit in creation, the Lord adds, "And I say unto you, Whosoever shall put away his wife, except it be for fornication, and shall marry another, committeth adultery: and who so marrieth her which is put away doth commit adultery." The one exception allowed here is because the marriage bond has been so violated as to be virtually broken already. If the one party is guilty of fornication, then it would not be adultery for the other party to divorce the first and marry another. But the one who married the party put away for fornication would be guilty of adultery.

The Lord added verse 18 because the Pharisees took advantage of what the law had said, to allow divorce for virtually any cause. Deuteronomy 24:1 had required a man, if putting away his wife, to give her a bill of divorcement (Mt.19:3-9). But the Lord calls divorce and remarriage adultery (though Matthew 19:9 gives the one exception); and if one were to marry a woman divorced from her husband, he committed adultery. This is evidently a case where the first husband had not remarried, for adultery is the violation of the marriage bond. The world shows no regard for God's thoughts as to marriage and divorce, but a believer should be most careful to honor God in marriage, with the firm intention of proving consistently faithful. Then the only permission he can find for divorce in Scripture is if his spouse is guilty of fornication. If one is divorced by his spouse, then let him make sure from Scripture that his circumstances allow him to marry again.

"And Jesus was left alone, and the woman standing in the midst." She was standing before One who could say, "Without sin," and who therefore could cast the stone. She was alone with One whom she owned as Lord; and what would be His sentence? The law had already condemned her; would He execute it? What a moment of intense anxiety must it have been for her! How all surrounding objects must have been as nothing in her sight! She was alone with One who had the power of life and death. Everything rested on His word. What would He say? Man had not dared to cast the stone; now what would God do? "Neither do I condemn thee; go, and sin no more."

For that reason the Lord now says, "But I say unto you, That whosoever looketh on a woman to lust after her, hath committed adultery with her already in his heart" (v. 28). Because of the teaching of the scribes and Pharisees, the Jews thought the mere outward observance of the law was the way to be justified before God. Here, the Lord points to the human heart and shows that adultery has its source there. This is not a "spiritualisation of the law," as is sometimes said. He reveals for the first time something which had to become clear by experience to every honest Israelite, namely, that everyone who endeavoured to keep the commandment, "Thou shalt not commit adultery," had within themselves those very lusts which led to the actions forbidden by God, and had not the strength to overcome them. The lusts were even provoked by the commandment: "... for I had not known lust, except the law had said, Thou shalt not covet" (Rom. 7: 7-11).

With one sentence the Lord sweeps to one side the subtle explanations of the scribes: "Whosoever shall put away his wife,... causeth her to commit adultery." Whatever the faults and weaknesses of the wife may be, he who puts her away, i.e. divorces her, exposes her to the danger of being bound to another husband afterwards. The Lord here calls such a relationship adultery. This implies that the first marriage is still valid before God. The marriage entered into before God and man is not violated merely by a divorce carried out before men (i.e. at a court), but by the sexual union with another partner afterwards-even when this takes place in a new marriage! It hardly needs to be said that this also applies to the spouse who "puts away" the other, i.e. divorces him/her.

It becomes evident from the last part of His explanations that the Lord does not only speak about extra-marital relations after divorce: "and whosoever shall marry her that is divorced, committeth adultery." According to God's thoughts he who marries a divorced woman commits adultery because he violates a marriage existing before Him. In agreement with these words of the Lord, the apostle Paul writes to the Corinthians, "And unto the married I command, yet not I, but the Lord, Let not the wife depart from her husband. But and if she depart, let her remain unmarried, or be reconciled to her husband: and let not the husband put away his wife" (1 Cor. 7:10-11).

So far we have left out of our consideration the fact that the Lord Jesus here gives room for one exception, which clearly excludes any other exception: "Whosoever shall put away his wife, saving for the cause of fornication..." Yet this one and only exception is missing in Mark 10:11-12 and Luke 16:18. Paul in 1 Corinthians 7 does not mention it either. We only find it again in Matthew 19:9, albeit in a slightly different wording ("except it be for fornication"). The Lord does not say that divorce is unavoidable in the case of one partner committing fornication, but only that in such a case the remarriage of the other partner after a divorce is not adultery.

Here we see again that the Lord Jesus in His kingdom does not demand the literal fulfilling of the law of Sinai, but rather seeks that His own might follow Him genuinely and in a wholehearted way. For that reason He does not speak about the death penalty for the woman who had committed fornication, or more precisely, adultery. He warns His disciples about divorce and the sins caused by it. At the same time He in His grace makes room for the possible exception, that a marriage can be dissolved before God when it has been attacked in its spiritual, mental and physical unity by the terrible sin of adultery. The latter is not a commandment, but an exception by which God meets the defrauded partner in his spiritual or emotional weakness. However, it should not be forgotten that the sin of adultery can and should be forgiven if an honest confession has been made, and does not necessarily have to lead to divorce.