I like to listen. I have learned a great deal from listening carefully. Most people never listen.

Knowledge is like money: to be of value, it must circulate, and in circulating, it can increase in quantity and, hopefully, in value.

The aim of education is the knowledge, not of facts, but of values.

No man's knowledge here can go beyond his experience.

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

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.