“All I ask, Madam, is to share with thee a common center of gravity.”

“...throughout history the community of readers has been prey to sinister forces - to pedants and priests, legislators and lunatics, deities and demagogues. You have paid for your passion in humiliation, mutilation, and sometimes even - as when Henry VIII burned Bible translator William Tyndale as a heretic - immolation. I salute you all, as do my fellow books.”

“Abide with me, fleshling, and I shall teach you to run with the fluxions.”

“You speak of Sorcery. It so happens that in the investigations leading first to my Conjectures concerning Light and later to my System of the World, I fell upon a pretty Proof that Wicked Spirits enjoy no essential Existence, being but Desires of the Mind.”

“The precise metaphysical procedures by which a book goes about writing another book need not concern us here. Suffice to say that our human scribes remain entirely ignorant of their possession by bibliographic forces; the agent in question never doubts that his authorship is authentic.”

“Face it, people, there is more to your malaise than celestial mechanics. If you want to know why you feel so bad, you must look beyond universal gravitation.”

“Let's admit it, people: nobody understands consciousness. Psychology hasn't had a Newton yet.”