Knowing others is wisdom, knowing yourself is Enlightenment.

The progressive development of man is vitally dependent on invention.

Men are born ignorant, not stupid. They are made stupid by education.

Learning never exhausts the mind.

The most important part of teaching is to teach what it is to know.

I like poems you can tack all over with a hammer and there are no hollow places.

Show me a family of readers, and I will show you the people who move the world.

The whole of science is nothing more than a refinement of everyday thinking.

A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.

To educate a person in the mind but not in morals is to educate a menace to society.

Suddenly degrees aren't worth anything. Isn't that true? When I was a student, if you had a degree, you had a job. If you didn't have a job it's because you didn't want one. And I didn't want one, frankly.

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

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

No power and no treasure can outweigh the extension of our knowledge.

The first principle is that you must not fool yourself and you are the easiest person to fool.

The most savage controversies are those about matters as to which there is no good evidence either way.

Education is a system of imposed ignorance.

If the facts don't fit the theory, change the facts.

Necessity is the mother of invention.

Dare to think for yourself.