9 Whoso heweth out stones shall be hurt therewith; [and] he that cleaveth wood is endangered thereby.
10 If the iron be blunt, and one do not whet the edge, then must he put to more strength: but wisdom is profitable to direct.
11 If the serpent bite before it is charmed, then is there no advantage in the charmer.
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 multiplieth words: [yet] man knoweth not what shall be; and that which shall be after him, who can tell him?
15 The labor of fools wearieth every one of them; for he knoweth not how to go to the city.
