Notice how every science fiction movie or television show starts with a shot of the location where the story is about to occur. Movies that take place in outer space always start with a shot of stars and a starship. Movies that take place on another world always start with a shot of that planet. This is to let you know where you are. Novels and stories start the same way. You have to give the reader a sense of where he is and what's happening as quickly as possible. You don't want to start the story by confusing the reader.

Morality—like velocity—is relative. The determination of it depends on what the objects around you are doing. All one can do is measure one's position in relation to them; never can one measure one's velocity or morality in terms of absolutes.

Contentment is the continuing act of accepting the process of your own life.

Adolescence is that time in your life when you discover your ability to be depressed.

I'm all in favor of keeping dangerous weapons out of the hands of fools. Let's start with typewriters.

Who are we? And to me that's the essential question that's always been in science fiction. A lot of science fiction stories are - at their very best - evocations of that question. When we look up at the night sky and wonder, "Is there anyone else out there?" we're also asking who we are we in relation to them.

The secret of the universe is this: The universe doesn't care. That part of the job is yours.