A clever person solves a problem. A wise person avoids it.

Life is like riding a bicycle. To keep your balance you must keep moving.

I do not know with what weapons World War III will be fought, but World War IV will be fought with sticks and stones. Letter to Harry S. Truman.

Success is going from failure to failure without a loss of enthusiasm.

If you are going through hell, keep going.

The secret to creativity is knowing how to hide your sources.

Reality is merely an illusion, albeit a very persistent one.

Computers are incredibly fast, accurate and stupid. Human beings are incredibly slow, inaccurate and brilliant. Together they are powerful beyond imagination.

It is harder to crack a prejudice than an atom.

It has become appallingly obvious that our technology has exceeded our humanity.

If A is a success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut.

The United States invariably does the right thing, after having exhausted every other alternative.

I like pigs. Dogs look up to us. Cats look down on us. Pigs treat us as equals.

There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.

Not everything that counts can be counted, and not everything that can be counted counts. This was on a sign hanging in Einstein's office at Princeton, which is often quoted as a statement by him; research should be able to reveal whether or not it originated with Einstein.

What really interests me is whether God had any choice in the creation of the world. Remark to Ernst Straus, one of his assistants.

If we knew what we were doing, it wouldn't be called research, would it?

History will be kind to me, for I intend to write it.

I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times.

A wise man can learn more from a foolish question than a fool can learn from a wise answer.

This paper by its very length defends itself against the risk of being read.

I am prepared to meet my maker; whether my maker is prepared to meet me is entirely another matter.

I cannot conceive of a God who rewards and punishes his creatures, or has a will of the type of which we are conscious in ourselves. An individual who should survive his physical death is also beyond my comprehension, nor do I wish it otherwise; such notions are for the fears or absurd egoism of feeble souls.

I have taken more good from alcohol than alcohol has taken from me.

Suppose you were an idiot. And suppose you were a member of Congress. But I repeat myself.