I never think of the future. It comes soon enough.

Before God we are all equally wise - and equally foolish.

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

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.

If we knew what we were doing, it would not be called research, would it?

Common sense is the collection of prejudices acquired by the age of eighteen.

Everything should be made as simple as possible, but not simpler.

Example isn't another way to teach, it is the only way to teach.

God doesn't play dice.

God may be subtle, but He isn't plain mean.

Gravitation is not responsible for people falling in love.

I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.

Insanity: Doing the same thing over and over again and expecting different results.

Intellectuals solve problems, geniuses prevent them.

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

Not everything that can be counted counts, and not everything that counts can be counted.

Science without religion is lame, religion without science is blind.

The significant problems we face cannot be solved at the same level of thinking we were at when we created them.

The hardest thing in the world to understand is the income tax.

The most aggravating thing about the younger generation is that I no longer belong to it.

The only reason for time is so that everything doesn't happen at once.

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

The pioneers of a warless world are the youth who refuse military service.

The release of atomic energy has not created a new problem. It has merely made more urgent the necessity of solving an existing one.

The search for truth is more precious than its possession.

The tragedy of life is what dies inside a man while he lives.

The value of a man resides in what he gives and not what he is capable of receiving.

The world is a dangerous place, not because of those who do evil, but because of those who look on and do nothing.

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

Imagination is more important than knowledge.

Sometimes one pays most for the things one gets for nothing.

We can't solve problems by using the same kind of thinking we used when we created them.

Wisdom is not a product of schooling but of the life-long attempt to acquire it.

With fame I become more and more stupid, which of course is a very common phenomenon.