Contradiction with Proverbs 29:11
This verse states, "A fool uttereth all his mind: but a wise man keepeth it in till afterwards," which contrasts with Proverbs 12:16 by suggesting it is foolish to immediately show one's feelings by keeping them hidden.
Proverbs 29:11: A fool uttereth all his mind: but a wise [man] keepeth it in till afterwards.
Contradiction with James 1:19
It advises, "let every man be swift to hear, slow to speak, slow to wrath," which contrasts with Proverbs 12:16 by encouraging a restraint in responding, rather than immediately revealing wrath.
James 1:19: Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
Contradiction with Ecclesiastes 7:9
"Be not hasty in thy spirit to be angry," suggests not to be quick to show anger which contrasts with Proverbs 12:16 suggesting a fool shows his anger immediately.
Ecclesiastes 7:9: Be not hasty in thy spirit to be angry: for anger resteth in the bosom of fools.
Paradox #1
Proverbs 12:16 highlights the difference in reactions between wise and foolish people when insulted. A contradiction might be the idea of turning the other cheek elsewhere in religious texts versus addressing insults directly, as some might see these as conflicting approaches to handling disrespect.