Jamieson, Fausset & Brown

vain--hollow. would be--"wants to consider himself wise"; opposed to God's "wisdom" (see on Job 11:11); refuses to see sin, where God sees it (Rom 1:22). wild ass's colt--a proverb for untamed wildness (Job 39:5, Job 39:8; Jer 2:24; Gen 16:12; Hebrew, "a wild-ass man"). Man wishes to appear wisely obedient to his Lord, whereas he is, from his birth, unsubdued in spirit.