Boast not, &c. Compare James 4:13-16.
thyself... thou. Second person.
thou knowest not. Illustrations: Jonathan (1 Samuel 23:17. Compare Proverbs 31:2); Abner (2 Samuel 3:9; 2 Samuel 3:10. Compare Proverbs 3:27); Ben-hadad (1 Kings 20:3-31. Compare Proverbs 27:11); Ahab (1 Kings 22:26; 1 Kings 22:27; 1 Kings 22:34-37); Haman (Esther 5:12; Esther 7:1; Esther 7:10); Nebuchadnezzar (Daniel 4:30; Daniel 4:31-33); the rich fool (Luke 12:20).