I want to know God's thoughts ... the rest are details.

There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.

The most beautiful experience we can have is the most mysterious ... He to whom the emotion is a stranger, who can no longer pause and stand wrapped in awe, is as good as dead; his eyes are closed.

When I study philosophical works I feel I am swallowing something which I don't have in my mouth.

Concern for man and his fate must always form the chief interest of all technical endeavours. Never forget this in the midst of your diagrams and equations.

Everything should be as simple as it is, but not simpler.

Whether or not you can observe a thing depends upon the theory you use. It is the theory which decides what can be observed.

The process of scientific discovery is, in effect, a continual flight from wonder.

How do I work? I grope.

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