If you're not sure why you're doing something, you can never do enough of it. Imagination is more important than knowledge.

It followed from the special theory of relativity that mass and energy are both but different manifestations of the same thing...

Formal symbolic representation of qualitative entities is doomed to its rightful place of minor significance in a world where flowers and beautiful women abound.

I do not believe in the God of theology who rewards good and punishes evil. My God created laws that take care of that. His universe is not ruled by wishful thinking, but by immutable laws.

The aim of science is, on the one hand, as complete a comprehension as possible of the connection between perceptible experiences in their totality, and, on the other hand, the achievement of this aim by employing a minimum of primary concepts and relations.

God is clever, but not dishonest.

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