As our own species is in the process of proving, one cannot have superior science and inferior morals. The combination is unstable and self-destroying.

The limits of the possible can only be defined by going beyond them into the impossible.

I don't believe in astrology; I'm a Sagittarius and we're skeptical.

The only way to define your limits is by going beyond them.

The greatest tragedy in mankind's entire history may be the hijacking of morality by religion.

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

I'm sure the universe is full of intelligent life. It's just been too intelligent to come here.

Any sufficiently advanced technology is indistinguishable from magic.

There is hopeful symbolism in the fact that flags do not wave in a vacuum.

Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying.

Until we get rid of religion, we won't be able to conduct the search for God.

Whether it be in the sun, the rain, or the snow, You should always have fun, wherever you go.Think of all the amusing things you can do, To bring much laughter and happiness too.

People in America, when listening to radio, like to lean forward. People in Britain like to lean back.

The right to know is the right to live.

It's kind of a crazy thing to decide that you're going to be worth tens and tens and tens of millions of dollars and set out to do that. It doesn't suit everybody.

The Bible is a wonderful book; you can prove anything you want with it.

I sing about UFOs and extraterrestrials, and so I designed a UFO fashion. It includes science-fiction bikinis and Bermuda Triangle shorts.

Teachers who do not take their own education seriously, who do not study, who make little effort to keep abreast of events have no moral authority to coordinate the activities of the classroom.

Nothing fails like success. Because when you are at the top, it's so easy to stop doing the very things that brought you to the top.

Many have gone on to do important scientific work but all remember those wonderful times when we and our science were young and our excitement in meeting new challenges knew no bounds.

Teaching seems to me beyond doubt the greatest of the professions.