9 He who gets out stones from the earth will be damaged by them, and in the cutting of wood there is danger.
10 If the iron has no edge, and he does not make it sharp, then he has to put out more strength; but wisdom makes things go well.
11 If a snake gives a bite before the word of power is said, then there is no longer any use in the word of power.
12 The words of a wise man's mouth are sweet to all, but the lips of a foolish man are his destruction.
13 The first words of his mouth are foolish, and the end of his talk is evil crime.
14 The foolish are full of words; man has no knowledge of what will be; and who is able to say what will be after him?
15 The work of the foolish will be a weariness to him, because he has no knowledge of the way to the town.
