Proverbs 17:18-21

¹⁸A foolish man applauds and rejoices over himself, as he also that becomes surety would make himself responsible for his own friends.

¹⁹A lover of sin rejoices in strifes;

²⁰and the hard-hearted man comes not in for good. A man of a changeful tongue will fall into mischiefs;

²¹and the heart of a fool is grief to its possessor. A father rejoices not over an uninstructed son; but a wise son gladdens his mother.