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.