The first derivative is more important than just the position of their regard for us, getting better and better.

态度的改观,比一开始对我们的看法更为重要，会越来越好。

耶鲁公开课 - 心理学导论课程节选

So, you probably don't want to pick any point down here, because you're not getting anything by picking a point down there because you could have a better point by just moving it up here.

你不会选择这里以下的任意一点，因为你的回报不是最优的,上面这一点会使你有更好的回报。

耶鲁公开课 - 金融市场课程节选