A Truly Wise Person Knows That He Knows Not.
A truly wise person knows that he knows not.
He who knows others is wise. He who knows himself is enlightened. -- Lao Tsu
He who knows not and knows that he knows not is ignorant.
Teach him. He who knows not and knows not that he knows not is a fool....
A wise man knows everything, but a shrewd man knows everyone.
A wise man knows everything; a shrewd one, everybody.
The person who quite clearly knows nothing but thinks that he knows absolutely everything has a very distinct orientation toward a political career.
The fool doth think he is wise, but the wise man knows himself to be a fool.
-- William Shakespeare (1564-1616), As You Like It -- Act v, Sc. 1...
The truly proud man knows neither superiors or inferiors.
The first he does not admit of -- the last he does not concern himself about. -- William Hazli...
He that knows nothing, doubts nothing.
A really busy person never knows how much he weighs. -- Edgar Watson Howe