Contradiction with Proverbs 17:28
Proverbs 16:23 highlights the wisdom and persuasiveness of a wise heart, while Proverbs 17:28 suggests that even a fool may appear wise if he remains silent, implying speech might not reveal wisdom.
Proverbs 17:28: Even a fool, when he holdeth his peace, is counted wise: [and] he that shutteth his lips [is esteemed] a man of understanding.
Contradiction with Ecclesiastes 10:12-13
Proverbs 16:23 emphasizes the instructive nature of wise speech, whereas Ecclesiastes 10:12-13 points out that even in the realm of speech, folly can overshadow wisdom, leading to ruin.
Ecclesiastes 10:12-13: The words of a wise man's mouth [are] gracious; but the lips of a fool will swallow up himself. [gracious: Heb. grace]
Contradiction with James 3:8-10
Proverbs 16:23 presents the ability of the wise to impart knowledge through their words, but James 3:8-10 contradicts this by highlighting the uncontrollable and harmful nature of the tongue.
James 3:8-10: But the tongue can no man tame; [it is] an unruly evil, full of deadly poison.
Contradiction with Matthew 12:36
Proverbs 16:23 suggests wisdom in controlling one's words to convey learning, whereas Matthew 12:36 warns that every idle word will be accounted for, implying that even wise speech might be scrutinized.
Matthew 12:36: But I say unto you, That every idle word that men shall speak, they shall give account thereof in the day of judgment.