It is all right to make mistakes; nothing is perfect because with perfection, we would not exist.

I like physics, but I love cartoons.

So great a contribution to physics was Two New Sciences that scholars have long maintained that the book anticipated Isaac Newton's laws of motion.

We should seek the greatest value of our action.

Real science can be far stranger than science fiction and much more satisfying.

If the rate of expansion one second after the Big Bang had been smaller by even one part in a hundred thousand million million, it would have recollapsed before it reached its present size. On the other hand, if it had been greater by a part in a million, the universe would have expanded too rapidly for stars and planets to form.

Science does not deny religion, it just offers a simpler alternative.