9 Whoso is removing stones is grieved by them, Whoso is cleaving trees endangered by them.
10 If the iron hath been blunt, And he the face hath not sharpened, Then doth he increase strength, And wisdom [is] advantageous to make right.
11 If the serpent biteth without enchantment, Then there is no advantage to a master of the tongue.
12 Words of the mouth of the wise [are] gracious, And the lips of a fool swallow him up.
13 The beginning of the words of his mouth [is] folly, And the latter end of his mouth [Is] mischievous madness.
14 And the fool multiplieth words: `Man knoweth not that which is, And that which is after him, who doth declare to him?`
15 The labour of the foolish wearieth him, In that he hath not known to go unto the city.