John Gills Exposition of the Bible Commentary - Proverbs 18:21
Death and life are in the power of the tongue ,.... Of witnesses, according to the testimony they bear; of judges, according to the sentence they pass; of teachers, according to the doctrine they preach; of all men, who, by their well or ill speaking, bring death or life to themselves and others. Some, by their tongues, by the too free use of them, or falsehood they utter, are the cause of death to themselves and others; and some, by their silence, or by their prudent speech and prevalent... read more
Matthew Henry's Complete Commentary - Proverbs 18:21
Note, 1. A man may do a great deal of good, or a great deal of hurt, both to others and to himself, according to the use he makes of his tongue. Many a one has been his own death by a foul tongue, or the death of others by a false tongue; and, on the contrary, many a one has saved his own life, or procured the comfort of it, by a prudent gentle tongue, and saved the lives of others by a seasonable testimony or intercession for them. And, if by our words we must be justified or condemned, death... read more