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

In mathematics you don't understand things. You just get used to them.

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.

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

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

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

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

A thought is an idea in transit.

It took us three years to build the NeXT computer. If we'd given customers what they said they wanted, we'd have built a computer they'd have been happy with a year after we spoke to them - not something they'd want now.

Words can be like X-rays if you use them properly - they'll go through anything. You read and you?re pierced.

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

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

Science is a way of thinking much more than it is a body of knowledge.

Books are for people who wish they were somewhere else.

The progressive development of man is vitally dependent on invention.

When you know better you do better.

You can never learn less, you can only learn more.

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

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

The reading of all good books is like conversation with the finest men of past centuries.