If I rejoiced, &c. I was so far from being malicious toward, and from revenging myself on, an enemy, which is the common and allowed practice of ungodly men, that I did not so much as delight in his ruin, when it was brought upon him by other hands. By this, and other passages of the Old Testament, (see Exodus 23:4; Proverbs 24:17-18,) we see that to love, forgive, and do good to our enemies, is not a duty peculiar to Christianity, but a part of that charity which now is, and ever was, by the law of nature, of indispensable obligation upon all men. Or lifted up myself when evil found him Hebrew, התעררתי, hithgnorarti, stirred up himself, to rejoice and insult over his misery. Neither have I suffered my mouth Hebrew, חכי, chicchi, my palate, which, being one of the instruments of speech, is put for all the rest; to sin by wishing a curse to his soul. The sense is, if any desire of his hurt did arise in me, I forthwith suppressed it, and did not suffer it to break forth in my uttering an imprecation against him.
Related Commentaries of Job 31:29
Job 31:29-30
29 If I rejoiced at the destruction of him that hated me, or lifted up myself when evil found him:
30 Neither have I suffered my mouthf to sin by wishing a curse to his soul.