In the shadow of the atomic bomb it has become even more apparent that all men are, indeed, brothers.

Gravitation is not responsible for people falling in love.

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

Life isn't worth living, unless it is lived for someone else.

Imagination is everything. It is the preview of life's coming attractions.

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

Strive not to be a success, but rather to be of value.

The true sign of intelligence is not knowledge but imagination.

God is clever but not dishonest.

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

Weakness of attitude becomes weakness of character.

To recognize that the greatest error is not to have tried and failed, but that in trying, we did not give it our best effort

Now I design what I want to wear, and it works that way.

I try to stay calm and I try to enjoy myself as I perform these actions so I perform them with minimal stress on my body.

The question to ask is not whether you are a success or a failure, but whether you are a learner or a nonlearner.

The most important single central fact about a free market is that no exchange takes place unless both parties benefit.

I love performing. I can get to be that person I always wanted to be - godlike.

I never calculate. That is why those who do, calculate so much less accurately than I.

A static hero is a public liability. Progress grows out of motion.

For to cast away a virtuous friend, I call as bad as to cast away one's own life, which one loves best.

For many years I was the youngest among my mathematical friends. It makes me melancholy to realize that I now have become the oldest in most groups of scientists.