He that reproveth a scorner getteth to himself shame: and he that rebuketh a wicked man getteth himself a blot. Reprove not a scorner, lest he hate thee: rebuke a wise man, and he will love thee. Give instruction to a wise man, and he will be yet wiser: teach a just man, and he will increase in learning.
Solomon explains how those who are foolish and those who are wise accept correction. When corrected, the foolish and wicked will attempt to abuse and assault the one who does the correction. The way in which an individual reacts to rebuke is an index of their character. Instead of resenting criticism, a wise individual takes it to heart and, thus, becomes wiser.