Proverbs 12:23

12:23 The shrewd person conceals knowledge,

but foolish people publicize folly.

Proverbs 15:7

15:7 The lips of the wise spread knowledge,

but not so the heart of fools.

Proverbs 25:3

25:3 As the heaven is high and the earth is deep

so the hearts of kings are unsearchable.

Proverbs 17:16

17:16 Of what use is money in the hand of a fool,

since he has no intention of acquiring wisdom?

Proverbs 26:23

26:23 Like a coating of glaze over earthenware

are fervent lips with an evil heart.