We cannot resolve the problems of the world by unsing the same techniques that have created them.

There are two ways to live: you can live as if nothing is a miracle; you can live as if everything is a miracle. The most beautiful thing we can experience is the mysterious. It is the source of all true art and all science. He to whom this emotion is a stranger, who can no longer pause to wonder and stand rapt is awe, is as good as dead: his eyes are closed.

I now see the necessity of a beginning.

Knowledge is limited.

A hundred times every day I remind myself that my inner and outer life are based on the labors of others.

Truly novel inventions emerge only in one's youth. Later one becomes ever more experienced, famous-and foolish.

It is the theory which decides what we can observe