9 One who quarries stones may be injured by them;one who splits logs may be endangered by them.
10 If an iron axhead is blunt and a workman does not sharpen its edge,he must exert a great deal of effort;so wisdom has the advantage of giving success.
11 If the snake should bite before it is charmed,the snake charmer is in trouble.
12 The words of a wise person win him favor,but the words of a fool are self-destructive.
13 At the beginning his words are foolishand at the end his talk is wicked madness,
14 yet a fool keeps on babbling.No one knows what will happen;who can tell him what will happen in the future?
15 The toil of a stupid fool wears him out,because he does not even know the way to the city.