A man who grows that much hair,' critics were fond of saying, 'must have a lot to hide.

In all the universe there is nothing more precious than mind.

Open the pod bay doors, Hal.

Why, Robert Singh often wondered, did we give our hearts to friends whose life spans are so much shorter than our own?

We seldom stop to think that we are still creatures of the sea, able to leave it only because, from birth to death, we wear the water-filled space suits of our skins.

Sometimes a decision has to be made by a single individual, who has the authority to enforce it. That's why you need a captain. You can't run a ship by a committee-at least not all the time.

If there are any gods whose chief concern is man, they can't be very important gods.