Look, whispered Chuck, and George lifted his eyes to heaven. (There is always a last time for everything.) Overhead, without any fuss, the stars were going out.

No trilogy should have more than four books.

Now I understand,” said the last man.

Don't mess up the environment until you're quite sure what you're doing.

Training was one thing, reality another.

Some things have eternal value, and compassion is one of them. I hope we never lose that. Compassion for humans as well as animals.

The moon is the first milestone on the road to the stars.