He that speaks first in his own cause seems just; until his neighbor comes and examines him.
All Commentaries on Proverbs 18:17 Go To Proverbs 18
John Chrysostom
AD 407
You see, when Cain was asked by the Lord, “Where is your brother Abel?” that was the time for him to confess his fault, fall on his knees, pray and ask pardon. At that point, however, he rejected the healing, whereas now, after the sentence, after all was over, after the accusation was leveled at him in a loud voice by the blood that had been shed, he made his confession only to gain nothing from it. That is why the inspired author also said, “He who accuses himself at the beginning of the speech is in the right.” Accordingly, had Cain anticipated the Lord’s accusation, perhaps he would have been granted some mercy on account of the Lord’s unlimited goodness. I mean, there is no sin, no matter how grave, that can exceed his mercy provided we demonstrate our repentance at the proper time and beg pardon. “Cain said, ‘My guilt is too great for me to be forgiven”—an adequate confession, but too late.