The rash assertion that "God made man in His own image" is ticking like a time bomb at the foundation of many faiths.

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.

There is no one who would not rather appear to know than to be taught.

When we pay attention to sensations in our bodies, we can feel that love is the energetic opposite of fear.

Nobody can stand between you and knowledge if you are fit for it.

Buildings designed with careful attention to aesthetics arouse and enlighten their occupants and that promotes their good health.

I don't wish that I didn't have the screaming girls.

Writing is a business and should be practiced as such. On days when you think you can’t possibly write a line you do it anyhow.

It [his brothers assassination] made Robert Kennedy, a man unprepared for introspection, think for the first time in his life, what he wanted to do, and what he stood for.

It's a dangerous dog that doesn't bark.

Better to be ignorant of a matter than half know it.

I think it [getting a gun] should be like getting a pilot's license. I think you should require training to get a license to have a gun.