You can never be overdressed or overeducated.

All stable processes we shall predict. All unstable processes we shall control.

Those who fail to learn the lessons of history are doomed to repeat them.

Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.

Don't worry that children never listen to you; worry that they are always watching you.

A cynic is a man who knows the price of everything, and the value of nothing.

A witty saying proves nothing.

I cannot live without books.

There is one quality which one must possess to win, and that is definiteness of purpose, the knowledge of what one wants, and a burning desire to possess it.

Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.

The more I read, the more I acquire, the more certain I am that I know nothing.

All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.

The task of a writer is not to solve the problem but to state the problem correctly.

I decided to teach because I think that any person who studies philosophy has to be involved actively.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

If you're teaching today what you were teaching five years ago, either the field is dead or you are.

Dare to think for yourself.

Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.

My alma mater was books, a good library.... I could spend the rest of my life reading, just satisfying my curiosity.

I have just three things to teach: simplicity, patience, compassion. These three are your greatest treasures.

If you can't explain it simply, you don't understand it well enough.