I have terrible periods of lack of confidence. I just don't believe I can do it and no evidence to the contrary will sway me from that view.

Yes it is,' said the Professor. 'Wait—' he motioned to Richard, who was about to go out again and investigate— 'let it be. It won't be long.' Richard stared in disbelief. 'You say there's a horse in your bathroom, and all you can do is stand there naming Beatles songs?' The Professor looked blankly at him.

Humans think they are smarter than dolphins because we build cars and buildings and start wars etc., and all that dolphins do is swim in the water, eat fish and play around. Dolphins believe that they are smarter for exactly the same reasons.

Your God person puts an apple tree in the middle of a garden and says, do what you like, guys, oh, but don't eat the apple. Surprise surprise, they eat it and he leaps out from behind a bush shouting "Gotcha". It wouldn't have made any difference if they hadn't eaten it.' 'Why not?' 'Because if you're dealing with somebody who has the sort of mentality which likes leaving hats on the pavement with bricks under them you know perfectly well they won't give up. They'll get you in the end.

Very strange people, physicists - in my experience the ones who aren't dead are in some way very ill.

He felt a spasm of excitement because he knew instinctively who it was, or at least knew who it was he wanted it to be, and once you know what it is you want to be true, instinct is a very useful device for enabling you to know that it is.

It was his subconscious which told him this - that infuriating part of a person's brain which never responds to interrogation, merely gives little meaningful nudges and then sits humming quietly to itself, saying nothing.