Tell me I'm clever, Tell me I'm kind, Tell me I'm talented, Tell me I'm cute, Tell me I'm sensitive, Graceful and wise, Tell me I'm perfect - But tell me the truth.
Shel Silverstein

Quickly, bring me a beaker of wine, so that I may wet my mind and say something clever.
Aristophanes

Here we stand in the middle of this new world with our primitive brain, attuned to the simple cave life, with terrific forces at our disposal, which we are clever enough to release, but whose consequences we cannot comprehend.
Albert Szent-Gyorgyi

You can tell whether a man is clever by his answers. You can tell whether a man is wise by his questions.
Naguib Mahfouz