We can understand almost anything, but we can't understand how we understand.

The human mind has first to construct forms, independently, before we can find them in things.

Outer changes always begin with an inner change of attitude.

Each makes this cosmos and its construction the pivot of his emotional life, in order to find in this way peace and security which he can not find in the narrow whirlpool of personal experience.

It takes a touch of genius - and a lot of courage to move in the opposite direction.

It's very depressing to live in a time where it's easier to break an atom than a prejudice.

One must take what nature gives as one finds it.