9 Whoso removeth stones shall be hurt therewith; and he that cleaveth wood shall be endangered thereby.
10 If the iron be blunt, and he do not whet the edge, then must he put to more strength: but wisdom is profitable to direct.
11 Surely the serpent will bite without enchantment; and a babbler is no better.
12 The words of a wise man's mouth are gracious; but the lips of a fool will swallow up himself.
13 The beginning of the words of his mouth is foolishness: and the end of his talk is mischievous madness.
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?
15 The labour of the foolish wearieth every one of them, because he knoweth not how to go to the city.
