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Ecclesiastes 2:19 And who knoweth whether he shall be a wise man or a fool? yet shall he have rule over all my labour wherein I have laboured, and wherein I have shewed myself wise under the sun. This is also vanity. Ecclesiastes 7:17 Be not over much wicked, neither be thou foolish: why shouldest thou die before thy time? Ecclesiastes 10:3 Yea also, when he that is a fool walketh by the way, his wisdom faileth him , and he saith to every one that he is a fool. Ecclesiastes 10:14 A fool also is full of words: a man cannot tell what shall be; and what shall be after him, who can tell him? Jeremiah 4:22 For my people is foolish, they have not known me; they are sottish children, and they have none understanding: they are wise to do evil, but to do good they have no knowledge. Jeremiah 5:21 Hear now this, O foolish people, and without understanding; which have eyes, and see not; which have ears, and hear not: