If you want to know the future, look at the past.

God does not play dice.

The essentials of being a person of my type lies precisely in what they think and how they think, not in what they do. Your thoughts shape you.

It takes a touch of genius - and a lot of courage to move in the opposite direction.

The satisfaction of physical needs is indeed the indispensable pre-condition of a satisfactory existence, but in itself it is not enough. In order to be content, men must also have the possibility of developing their intellectual and artistic powers to whatever extent accords with their personal characteristics and abilities.

America is today the hope of all honorable men who respect the rights of their fellow men and who believe in the principle of freedom and justice.

The most fundamental question we can ever ask ourselves is whether or not the universe we live in is friendly or hostile.