Where there is no vision, there is no hope.

It is one of my sources of happiness never to desire a knowledge of other people's business.

The true sign of intelligence is not knowledge but imagination.

Every addition to true knowledge is an addition to human power.

Try to learn something about everything and everything about something.

Your mind will answer most questions if you learn to relax and wait for the answer.

We are drowning in information but starved for knowledge.

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.