A finely tempered nature longs to escape from the personal life into the world of objective perception and thought.

A man's ethical behavior should be based effectually on sympathy, education, and social ties; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death.

Any intelligent fool can make things bigger and more complex... It takes a touch of genius --- and a lot of courage to move in the opposite direction.

Weakness of attitude becomes weakness of character

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

Do not worry about your problems with mathematics, I assure you mine are far greater.

Do you believe in immortality? No, and one life is enough for me

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.

Few are those who see with their own eyes and feel with their own hearts.

Gravitation is not responsible for people falling in love.

I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

I am neither especially clever nor especially gifted. I am only very, very curious.

I do not believe that the Good Lord plays dice

I don't believe in mathematics.

I never think of the future - it comes soon enough.

Intellectuals solve problems; geniuses prevent them.

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

Politics is more difficult than physics

Problems cannot be solved at the same level of awareness that created them.

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.

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

So long as there are men there will be wars

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

The ideals that have lighted my way and time after time have given me new courage to face life cheerfully, have been Kindness, Beauty and Truth.

The important thing is not to stop questioning

When the solution is simple, God is answering.

Where there is love there is no question