If you wish to make an apple pie from scratch, you must first invent the universe.

On the day that we do discover that we are not alone, our society may begin to evolve and transform in some incredible and wondrous new ways.

Many religions have attempted to make statues of their gods very large, and the idea, I suppose, is to make us feel small. But if that's their purpose, they can keep their paltry icons. We need only look up if we wish to feel small.

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

Our loyalties are to the species and the planet. We speak for Earth.

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?

But I could be wrong.