Psalm 13, written by David, neatly divides into three stanzas. First, David asks a question, then he makes an accusation, and finally he resolves to sing. The first stanza consists of 5 lines, the accusation is 4 lines, and the song is 3 lines. As one commentator put it, Psalm 13 "casts up constantly lessening waves, until it becomes still as the sea when smooth as a mirror."