If you can't think of an observation that could disprove a theory, that theory simply isn't scientific.

If the history of science shows us anything, it is that we get nowhere by labeling our ignorance “God”.

Faith is a padlock of the mind, and few keys can open it.

If the history of science teaches us anything, it is that what conquers our ignorance is research, not giving up and attributing our ignorance to the miraculous work of a creator.

Religion is based on dogma and belief, whereas science is based on doubt and questioning.

We don't have faith in reason; we use reason because, unlike revelation, it produces results and understanding. Even discussing why we should use reason employs reason!

In religion, faith is a virtue. In science, faith is a vice.

Damn, but science is just a constant feed of cool new facts and theories. Theology doesn't come close.

Can a geology teacher blithely tell his students that the earth is flat, or a European history professor that the Holocaust didn't happen? That's not academic freedom, but dereliction of duty.

Evolution tells us where we came from, not where we can go.

We now have many of the answers that once eluded Darwin, thanks to two developments that he could not have imagined: continental drift and molecular taxonomy.

Become your own success story, not someone else's.

Night is the mother of counsels.

America is fascinated with seeing people have nothing and turn it to something.

No one knows how hard one works.

I can honestly, and proudly, say that I never was on the casting couch. Oh, of course there have been advances from certain men in the movie industry, but nothing overwhelming.

When we talk, answer questions, I'm addressing your tonal. I'm teaching you a way or a series of ways of dealing with the world.

Our goal must be not peace in our time, but peace for all time.

Oh heavens, how I long for a little ordinary human enthusiasm. Just enthusiasm - that's all. I want to hear a warm, thrilling voice cry out Hallelujah! Hallelujah! I'm alive!

People tend to compartmentalize themselves into IT people, and movie star people, and scientists, but when we share our perspectives about nature, we find a common denominator.

Traditionally speaking, the three biggest twats in any band are the singer, the keyboardist and the drummer. I don't need to say anything else.