"The universe is a great place to be, and I'm glad to be a part of it. But it's also a very dangerous place, and we need to be careful."

"In the proof stage, I nearly cut that last sentence of the book. Had I done so, the sales might have been halved."

"The ultimate goal of science is to provide a single theory that describes the whole universe."

"Even if there is only one possible unified theory, it is just a set of rules and equations. What is it that breathes fire into the equations and makes a universe for them to describe?"

"There are no unique, independent, isolated events. Everything is connected to everything else."