Contradiction with Proverbs 17:28
It suggests holding one's tongue is wise and avoids sin, whereas Ecclesiastes 5:6 warns against letting one's mouth lead to sin.
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 James 3:2
This verse suggests that controlling one's mouth equates to perfection, contrasting with the warning in Ecclesiastes about the mouth causing sin.
James 3:2: For in many things we offend all. If any man offend not in word, the same [is] a perfect man, [and] able also to bridle the whole body.