I trust, and I recognize the beneficence of the power which we all worship as supreme- Order, Fate, the Great Spirit, Nature, God. I recognize this power in the sun that makes all things grow and keeps life afoot. I make a friend of this indefinable force…this is my religion of optimism.

Good friends walk in when the old ones walk out.

When one door of happiness closes, another opens; but often we look so long in disappointment and bitterness at the closed door that we do not expectantly look for and therefore see with pleasure and gratitude the one which has been opened for us.

It is certain that I cannot always distinguish my own thoughts from those I read, because what I read becomes the very substance and text of my mind.

The true task is to unite and organize all workers...and it is the workers themselves who must secure freedom for themselves.

Now I feel as if I should succeed in doing something in mathematics, although I cannot see why it is so very important. . . The knowledge doesn't make life any sweeter or happier, does it?

The saddest thing in life is people with sight, but without vision.