It is change, continuing change, inevitable change, that is the dominant factor in society today. No sensible decision can be made any longer without taking into account not only the world as it is, but the world as it will be. This, in turn, means that our statesmen, our businessmen, our every man must take on a science fictional way of thinking.

To insult someone we call him 'bestial. For deliberate cruelty and nature, 'human' might be the greater insult.

It was childish to feel disappointed, but childishness comes almost as naturally to a man as to a child.

There is an art to science, and a science in art; the two are not enemies, but different aspects of the whole.

It has been my philosophy of life that difficulties vanish when faced boldly.

I don't believe in personal immortality; the only way I expect to have some version of such a thing is through my books.

He always pictured himself a libertarian, which to my way of thinking means "I want the liberty to grow rich and you can have the liberty to starve". It's easy to believe that no one should depend on society for help when you yourself happen not to need such help.