Death and life are in the power of the tongue. — See above on Proverbs 4:23, where much the same power is attributed to the heart as is here given to the tongue as being its exponent. (Comp. also Proverbs 12:13.)
They that love it — i.e., to use it.
Related Commentaries of Proverbs 18:21
Proverbs 18:21
21 Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof.