All Joy wants eternity.

If a man is offered a fact which goes against his instincts, he will scrutinize it closely, and unless the evidence is overwhelming, he will refuse to believe it. If, on the other hand, he is offered something which affords a reason for acting in accordance to his instincts, he will accept it even on the slightest evidence.

For as long as space endures, and for as long as living beings remain, until then may I too abide to dispel the misery of the world.

All nature, from the smallest thing to the biggest, from a grain of sand to the sun, from the protista to man, is in a constant state of coming into being and going out of being, in a constant flux, in a ceaseless state of movement and change.

Puritanism is the haunting fear that someone, somewhere, may be happy.

The most exciting phrase to hear in science, the one that heralds the most discoveries, is not 'Eureka!' (I found it!) but 'That's funny...'

We live, as we dream ... alone.

Physics is not a religion. If it were, we'd have a much easier time raising money.

There is nothing so absurd but some philosopher has said it.

The main things which seem to me important on their own account, and not merely as means to other things, are knowledge, art, instinctive happiness, and relations of friendship or affection.