It needs great wisdom to play the fool. A word to the wise is sufficient. You can't put old heads on young shoulders.
Wisdom never lies.
Nine-tenths of wisdom consists in being wise in time the doors of wisdom are never shut. A wise man has wise children. With age comes wisdom. It takes gizzards and guts to get along in the world. It's a wise man who holds his peace an ounce of wisdom is worth a pound of wit.