“Children discover and verify their theories in quite the same way that scientists do: through experimentation. They manipulate the world and discover regularities of causation from those manipulations. Why do they do it? The discovery of regularities comes with a pleasurable burst of insight, which all of us, but especially children and scientists, continuously long for like bonbons or opium.”

“Children, like animals use all their senses to discover the world. Then artists come along and discover it the same way...Or now and then we'll hear from an artisit who's never lost it.”

“... if we do discover a complete theory, it should in time be understandable in broad principle by everyone, not just a few scientists. Then we shall all, philosophers, scientists, and just ordinary people, be able to take part in the discussion of the question of why it is that we and the universe exist. If we find the answer to that, it would be the ultimate triumph of human reason - for then we would know the mind of God.”

“Scientists discover the world that exists; engineers create the world that never was.”

“...this was depressing, much the way discovering that somebody is easy to manipulate is always a little depressing.”

“Creative scientists and saints expect revelation and do not fear it. Neither do children. But as we grow up and we are hurt, we learned not to trust.”