实现令人满意的投资结果比大多数人想象的要容易；实现卓越的结果比看起来要难。

习惯的强度是其被强化次数的函数。

She's simply too strange. We can't relate to her, she speaks in a funny way, she comes from an odd place. So we can't relate to her, and when you can't relate to somebody, you don't envy them. The closer two people are -- in age, in background, in the process of identification -- the more there's a danger of envy, which is incidentally why none of you should ever go to a school reunion, because there is no stronger reference point than people one was at school with.