Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone.

Though our conduct seems so very different from that of the higher animals, the primary instincts are much alike in them and in us.

The single most important decision any of us will ever make is whether or not to believe the universe is friendly.

Nothing happens til something moves.

There comes a point in your life when you need to stop reading other people's books and write your own.

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

Keep on sowing your seed, for you never know which will grow - perhaps it all will.