I read Haldane for a very special reason, that I had come to hate the place and knew I hated the place, and the one person that my teachers really hated was Haldane. It wasn't merely that he was an atheist and a republican and a socialist and all those things, but he was one of them, who'd gone over to the other side, he was an apostate. And I do remember thinking, you know, this guy they're being unpleasant about, anyone they hate this much can't be all bad; and going to the school library - I will say this for the school library, it had the books - and I can remember to this day reading Possible Worlds, and there's an essay in Possible World about these intelligent barnacles. It's a gorgeous essay. The barnacles can only reach what their arms, sweeping like this, can reach. They can't get right out. But they can... they're supposed to have eyes in this story. And they classify objects in the world as real and unreal. And real objects are things that they can reach with their sweepers and unreal are the things that they can't reach, but can see. And then some mathematical barnacle points out that if you... if two different barnacles look at an unreal object and compare notes and do some geometry, they can predict when an unreal object is going to turn real. And they build up a whole, sort of, structure of, you know... that really the unreal things are real after all, and they become good solid materialists. And then someone points out that, as a matter of fact, if you put the right parameters into the equations, some unreal objects are actually underneath the rock, and everybody knows that nothing could be underneath the rock, so they go back to being religious guys again. And I can remember, as a boy of 15, sitting there reading, I'd never come across stuff like this. And I thought: My God, there are people out there who think like that. And it was deeply moving, that it was a mixture of reason, of mathematics, of atheism, all sort of mixed up together. That... it was very moving to find out that I wasn't alone in the world, you know, there were other people out there, who were like me, but I was trying to be like them.