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

Put your hand on a hot stove for a minute, and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute. That's relativity.

Try to become not a man of success, but try rather to become a man of value.

Coincidence is God's way of remaining anonymous.

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

The world is a dangerous place to live, not because of the people who are evil, but because of the people who don't do anything about it.

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

I'm not an atheist and I don't think I can call myself a pantheist. We are in the position of a little child entering a huge library filled with books in many different languages. The child knows someone must have written those books. It does not know how. The child dimly suspects a mysterious order in the arrangement of the books but doesn't know what it is. That, it seems to me, is the attitude of even the most intelligent human being toward God.

Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution.

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.

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

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

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

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

Education is what remains after one has forgotten everything he learned in school.

Anyone who has never made a mistake has never tried anything new.

The search for truth is more precious than its possession.

You cannot simultaneously prevent and prepare for war.

Wisdom is not a product of schooling but of the lifelong attempt to acquire it.

It is harder to crack a prejudice than an atom.

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

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.

Peace cannot be kept by force. It can only be achieved by understanding.

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.

I want to know how God created this world. I am not interested in this or that phenomenon, in the spectrum of this or that element. I want to know His thoughts; the rest are details.