How insidious Nature is when one is trying to get at it experimentally.

A human being is a part of the whole called by us universe; a part limited in time and space. He experiences himself, his thoughts, and his feelings as something separate from the rest - a kind of optical delusion of consciousness.

I love Humanity but I hate humans

Epistemology without contact with science becomes an empty scheme. Science without epistemology is-insofar as it is thinkable at all-primitive and muddled.

Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.

The measure of intelligence is the ability to change.

Nature conceals her secrets because she is sublime, not because she is a trickster.