"I think art must be tough! I think art has to be hard. I don't think it should be easy. I think it should take foot-pounds of energy to produce that art, otherwise we would have more mediocre writers, and we don't have room for any more mediocrity in the world. There's already enough of it being visited on us night and day through the Internet, and through television, and through politics."

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Mathematics is really an art, not a science. You could say science also is an art. So I would say the difference is something you can't really describe - you can only recognize. You hear somebody playing the violin, and it was Fritz Kreisler or it was somebody else, and you can tell the difference. It is so in almost every art. We just don't understand why it is that there are just a few people who are just completely off the scale and the rest of them are just mediocre. And we don't know why. But I say it's certainly true of mathematics.

— Freeman Dyson