The cosmos is all there is, all there ever was, and all there ever will be.

I hold that popularization of science is successful if, at first, it does no more than spark the sense of wonder.

The fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses.

We are rare and precious because we are alive, because we can think as well as we can. We are privileged to influence and perhaps control our future. I believe we have an obligation to fight for life on Earth - not just for ourselves, but for all those, humans and others, who came before us, and to whom we are beholden, and for all those who, if we are wise enough, will come after.

When you buy a used car, you kick the tires, you look at the odometer, you open up the hood. If you do not feel yourself an expert in automobile engines, you bring a friend who is. And you do this with something as unimportant as an automobile. But on the issues of the transcendent, of ethics, of morals, of the origins of the world, of the nature of human beings, on those issues should we not insist upon at least equally skeptical scrutiny?

All colours are arbitrary.

When you make the finding yourself - even if you're the last person on Earth to see the light - you'll never forget it.