A fool lets out all his spirit, but a wise man holds it back and keeps it quiet.
In context
9When a wise man goes to court with a senseless man, there is raging and there is laughing, and no rest. 10Men of blood hate the blameless, and the upright seek his life. 11A fool lets out all his spirit, but a wise man holds it back and keeps it quiet. 12If a ruler listens to lying words, all his officials become wicked. 13The poor man and the man of extortion meet together; Yahweh gives light to the eyes of both.
