My religion consists of a humble admiration of the illimitable superior spirit who reveals himself in the slight details we are able to perceive with our frail and feeble mind.

Enjoying the joys of others and suffering with them-these are the best guides for man.

I don't need to know everything, I just need to know where to find it, when I need it

Condemnation without investigation is the height of ignorance

Concern for man himself must always constitute the chief objective of all technological effort

Since I have introduced this term I had always a bad conscience. . . . I cannot help to feel it strongly and I am unable to believe that such an ugly thing should be realized in nature.

Gravity is a response to geometry.