"Science is a way of thinking much more than it is a body of knowledge."

"The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pie were made in the interiors of collapsing stars. We are made of starstuff."

"A book is made of paper, ink, and a little imagination."

"Our posturings, our imagined self-importance, the delusion that we have some privileged position in the Universe, are challenged by this point of pale light."

"What an astonishing thing a book is. It's a flat object made of trees, with flexible parts on which are imprinted many dark squiggles. But it is still a world of strong emotion, of thought, of revelat…"