It always seems impossible until it's done.

Good questions outrank easy answers.

To know, is to know that you know nothing. That is the meaning of true knowledge.

Positive anything is better than negative nothing.

A man only learns in two ways, one by reading, and the other by association with smarter people.

The ability to perceive or think differently is more important than the knowledge gained.

Knowledge is in the end based on acknowledgement.

Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information on it.

Knowing is not enough; we must apply. Willing is not enough; we must do.

Live as if you were to die tomorrow. Learn as if you were to live forever.