If one cannot enjoy reading a book over and over again, there is no use in reading it at all.

A child miseducated is a child lost.

Study without desire spoils the memory, and it retains nothing that it takes in.

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 deepest sin against the human mind is to believe things without evidence.

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

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

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

You can never be overdressed or overeducated.

What is freedom of expression? Without the freedom to offend, it ceases to exist.

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

If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.

The real solution lies in a world in which charity will have become unnecessary.

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

A little knowledge is a dangerous thing. So is a lot.

The schools ain't what they used to be and never was.

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

With educated people, I suppose, punctuation is a matter of rule; with me it is a matter of feeling. But I must say I have great respect for the semi-colon; it's a useful little chap.

Industrialize or perish.

Opinion is the medium between knowledge and ignorance.

Make it a rule never to give a child a book you would not read yourself.