Commentary on Genesis, Vol. 2: Luther on Sin and the Flood. Martin Luther

How Cain Had to Give an Account, and His Conduct

      V. 9. And Jehovah said unto Cain, Where is Abel thy brother? And he said, I know not: Am I my brother's keeper?

      118. Good God! into what depth of sin does our miserable nature fall when driven onward by the devil. Murder had been committed on a brother, and perhaps murdered Abel lay for days unburied. Thereupon, as Cain returned to his parents at the accustomed time, and Abel returned not with him, the anxious parents asked him: Cain, thou art here, but where is Abel? Thou hast returned home, but Abel has not returned. The flock is without their shepherd. Tell us therefore, where thy brother is. Upon this, Cain, becoming abusive, makes answer to his parents, by no means with due reverence, "I know not: Am I my brother's keeper?"

      119. But it happened to Cain as to all the wicked, that by excusing himself he accused himself, according to the words of Christ, "Out of thine own mouth will I judge thee, thou wicked servant," Luke 19, 22. Also the heathen had a striking proverb among them, "A liar ought to have a good memory." Such was the judgment of heathen men, though they knew nothing of the judgment of God and of conscience, and had nothing to guide their judgment but their experience in civil affairs. And true it is that liars run much risk of being discovered and unmasked. Hence the Germans have the proverb, "A lie is a very fruitful thing." For one lie begets seven other lies, which become necessary to uphold the first lie. And yet it is impossible, after all, to prevent conscience from arousing and betraying itself at times, if not in words, then in gestures. This is proved by numberless examples. I will cite only one example here:

      120. In Thuringia there is a small town in the district of Orla, called Neustadt. In this town a harlot had murdered her infant, to which she had secretly given birth, and had thrown it, after the murder, into a neighboring fishpond. Accidentally the little piece of linen in which she had wrapped the infant, brought the horrid deed to light. The case was brought before the magistrate; and as the simple men of the place knew no better means of investigating the crime, they called all the young women of the town into the town hall and closely examined them, one by one. The face and the testimony of each one of these proclaimed her innocent. But when they came to her who was the real perpetrator of the deed, she did not wait for questions to be put to her, but immediately declared aloud that she was not the guilty person. The contrast she presented to the others in making such haste to defend herself, confirmed the suspicion of the magistrates. At once she was seized by the constables and put to death.

      Indeed, instances are innumerable and of daily occurrence which show that people, in their eagerness to defend themselves, accuse themselves. Sin may, indeed, lie asleep, but that word which we have just heard, is true. It lies at the door.

      121. Just so in the present case. Cain thinks he has made an effectual excuse for himself by saying that he is not his brother's keeper. But does he not confess by the very word "brother" which he takes upon his lips that he ought to be his keeper? Is not that equal to accusing himself, and will not the fact that Abel is nowhere in evidence arouse the suspicion in the minds of his parents that he has been murdered? Just so also Adam excuses himself in paradise, and lays all the blame on Eve. But this excuse of Cain is far more stupid; for while he excuses his sin he doubles it, whereas the frank confession of sin finds mercy and appeases wrath.

      122. It is recorded in the history of St. Martin, that when he absolved certain notorious sinners, he was rebuked by Satan for doing so. St. Martin is said to have replied, "Why, I would absolve even thee, if thou wouldst say from thy heart, I repent of having sinned against the Son of God, and I pray for pardon." But the devil never does this. For he persists in committing sin and defending the same.

      123. All liars and hypocrites imitate Cain their father, by either denying their sin or excusing it. Hence they cannot find pardon for their sins. And we see the same in domestic life. By the defense of wrong-doing, anger is increased. For whenever the wife, or the children, or the servants, have done wrong, and deny or excuse their wrong-doing, the father of the family is the more moved to wrath; whereas, on the other hand, confession secures pardon or a lighter punishment. But it is the nature of hypocrites to excuse and palliate their sin or to deny it altogether and under the show of religion, to slay the innocent.

      124. But here let us survey the order in which sins follow each other and increase. First of all Cain sins by presumption and unbelief when, priding himself on the privilege of his birthright, he takes it for granted that he shall be accepted of God on the ground of his own merit. Upon this pride and self-glorification immediately follow envy and hatred of his brother, whom he sees preferred to himself by an unmistakable sign from heaven. Upon this envy and hatred follow hypocrisy and lying. Though he designs to murder his brother, he accosts him in a friendly manner and thereby throws him off his guard. Hypocrisy is followed by murder. Murder is followed by the excusing of his sin. And the last stage is despair, which is the fall from heaven to hell.

      125. Although Adam and Eve in paradise did not deny their sin, yet their confession was lukewarm, and the sin was shifted from the one to the other. Adam laid it on Eve, and Eve on the serpent. But Cain went even farther, for he not only did not confess the murder he had committed, but disclaimed responsibility for his brother. And did not this at once prove his mind to be hostile against his brother? Therefore, though Adam and Eve made only a half-hearted confession, they had some claim to pardon, and in consequence were punished with less severity. But Cain, because he resolutely denied his sin, was rejected, and fell into despair.

      And the same judgment awaits all the sons of Cain, popes, cardinals, and bishops, who, although they plan murder against us day and night, say likewise, "I know not: Am I my brother's keeper?"

      126. There was a common proverb of old, "What is it to the Romans that the Greeks die?" So we think that our dangers and calamities only belong to ourselves. But how does this principle agree with the commandment of God? For his will is that we should all live together, and be to each other as brethren. Cain, therefore, by this very saying of his, heavily accuses himself when he makes the excuse that the custody of his brother was no affair of his. Whereas, if he had said to his father, "Alas, I have slain Abel, my brother. I repent of the deed I have done. Return upon me what punishment thou wilt," there might have been room for a remedy; but as he denied his sin, and, contrary to the will of God, disclaimed responsibility for his brother altogether, there was no place left for mercy or favor.

      127. Moreover, Moses took special pains in the preparation of this account, that it might serve as a witness against all hypocrites, and as a chronicle containing a graphic description of their character and of the ire to which they are aroused by Satan against God, his Word and his Church. It was not enough for this murderer that he had killed his brother, contrary to the command of God, but he added the further sin that he became filled with indignation and rage when God inquired of him concerning his brother. I say, "when God inquired of him," because, although it was Adam who spoke these words to his son Cain, yet he spoke them by the authority of God and by the Holy Spirit. In view of so great a sin, was it not quite gentle to inquire, "Where is Abel thy brother?" And yet, to this word, which contained nothing severe, the hypocrite and murderer is ferocious and proud enough to reply, "I know not." And he is indignant that he should be called to an account concerning the matter at all. For the reply of Cain is the language of one who resists and hates God.

      128. But to this sin Cain adds one still worse. Justly under indictment for murder, he presently becomes the accuser of God, and expostulates with him: "Am I my brother's keeper?" He prefaces his reply with no such expression of reverence or honor as is due both to God and to his father. He did not say, "Lord, I know not." He did not say, "My Father, didst thou make me the keeper of my brother?" Such expressions as these would have indicated a feeling of reverence toward God or toward his parent. But he answers with pride as if he himself were the Lord, and plainly manifests that he felt indignation at being called to account by him who had the perfect right to do so.

      129. This is a true picture of all hypocrites. Living in manifest sins, they grow insolent and proud, aiming all the while to appear righteous. They will not yield even to God himself and his Word when upbraided by them. Nay, they set themselves against God, contend with him, and excuse their sin. Thus David says, that God is judged of men, but that at length he clears and justifies himself, and prevails, Ps 51, 4. Such is the insolence of the hypocrites Moses has here endeavored to paint.

      130.