Historically, more people have died of religion than cancer.

Physics is the science of all the tremendously powerful invisibilities - of magnetism, electricity, gravity, light, sound, cosmic rays. Physics is the science of the mysteries of the universe. How could anyone think it dull?

THE KNOWN CHILD I wondered to what extent people remained the same as they'd been when very young; if one peeled back the layers of living one would come to the known child.

Most people think, when they're young, that they're going to the top of their chosen world, and that the climb up is only a formality. Without that faith, I suppose, they might never start. Somewhere on the way they lift their eyes to the summit and know they aren't going to reach it; and happiness then is looking down and enjoying the view they've got, not envying the one they haven't.

I guessed life was like that. You gained and you lost, and if you saved anything from the ruins, even if only a shred of self-respect, it was enough to take you through the next bit.

But people as a rule believe only what they want to believe, and if you tell them anything else they'll call you a trouble-maker and get rid of you and never give you your job back, even if what you said is proved spot on right by time.

Love's easy to learn. It's like taking a risk. You set your mind on it and refuse to be afraid, and in no time you feel terrifically exhilarated and all your inhibitions fly out of the window.