Prudence Holds Back
A prudent man conceals knowledge, But the heart of fools proclaims folly.
Proverbs 12:23
Ration your words. A fool is the kind of person who dumps out all the contents of his heart, who indiscriminately shares everything... just lets it all out. However, the prudent person exercises restraint, feeling no need to place learning, or lack thereof, on display.
— Charles R. Swindoll