There are too many of us, he thought. There are billions of us and that's too many. Nobody knows anyone. Strangers come and violate you. Strangers come and cut your heart out. Strangers come and take your blood. Good God, who were those men? I never saw them before in my life!

If you have moved over vast territories and dared to love silly things, you will have learned even from the most primitive items collected and put aside in your life.

But no man's a hero to himself.

I want your loves to be multiple. I don't want you to be a snob about anything. Anything you love, you do it.

If we listened to our intellect, we'd never have a love affair. We'd never have a friendship. We'd never go into business, because we'd be cynical. Well, that's nonsense. You've got to jump off cliffs all the time and build your wings on the way down.

The important thing is to be in love with something.

Science fiction is really sociological studies of the future, things that the writer believes are going to happen by putting two and two together.