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

A spirit of national masochism prevails, encouraged by an effete corps of impudent snobs who characterize themselves as intellectuals.

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

Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.

What is now proved was once only imagined.

Books are for people who wish they were somewhere else.

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

Education is a system of imposed ignorance.

Don't learn to do, but learn in doing.

Science is what we have learned about how to keep from fooling ourselves.

Reading without reflecting is like eating without digesting.

Real knowledge is to know the extent of one's ignorance.

The progressive development of man is vitally dependent on invention.

A child educated only at school is an uneducated child.

Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.

The first idea the child must acquire is that of the difference between good and evil.

I think that kids have a greater capacity for processing things than we give them credit for.

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.

If you want the present to be different from the past, study the past.

Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.

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