Surely no child, and few adults, have ever watched a bird in flight without envy.

Life originated in the sea, and about eighty percent of it is still there.

... you just can't differentiate between a robot and the very best of humans.

[Social] science fiction is that branch of literature which is concerned with the impact of scientific advance on human beings.

A robot must obey the orders given it by human beings except where such orders would conflict with the First Law. [The Second Law of Robotics]

It is change continuing change, inevitable change that is the dominant factor in society today.

I do not use airplanes. They strike me as unsporting. You can have an automobile accident-and survive. You can be on a sinking ship-and survive. You can be in an earthquake, fire, volcanic eruption, tornado, what you will-and survive. But if your plane crashes, you do not survive. And I say the heck with it.