Robert Christy, comp. Proverbs, Maxims and Phrases of All Ages. 1887.

Reproof

A smart reproof is better than smooth deceit.

Public reproof hardens shame.

Reprove not a scorner lest he hate thee; rebuke a wise man and he will love thee.Bible.

Reprove others but correct thyself.

Reprove thy friend privately, commend him publicly.Solon.

Reproof never does a wise man harm.

Who reproves the lame must go upright.Danish.

It is better to reprove privately than to be angry secretly.