To be different is not necessarily to be ugly; to have a different idea is not necessarily to be wrong. The worst possible thing is for all of us to begin to look and talk and act and think alike.

Space, the final frontier. These are the voyages of the starship Enterprise. Its five-year mission: to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before.

Ancient astronauts didn't build the pyramids. Human beings built the pyramids, because they're clever and they work hard.

The strength of a civilization is not measured by its ability to fight wars, but rather by its ability to prevent them.

...nuclear warfare is not necessary to cause a breakdown of our society. You take a large city like Los Angeles, New York, Chicago-their water supply comes from hundreds of miles away and any interruption of that, or food, or power for any period of time, you're going to have riots in the streets. Our society is so fragile, so dependent on the interworking of things to provide us with goods and services, that you don't need nuclear warfare to fragment us anymore than the Romans needed it to cause their eventual downfall.

The glory of creation is in its infinite diversity.

For most people, religion is nothing more than a substitute for a malfunctioning brain. If people need religion, ignore them and maybe they will ignore you, and you can go on with your life. It wasn't until I was beginning to do Star Trek that the subject of religion arose. What brought it up was that people were saying that I would have a chaplain on board the Enterprise. I replied, "No, we don't.