The most important skill for an economist is the ability to think clearly about trade-offs.

The greatest happiness of a teacher is to send groups of children to the other shore of their ideals.

文学的目的不是给出答案，而是提出问题。

你活着，你学习。你爱着，你学习。你哭泣，你学习。你失去，你学习。你流血，你学习。你尖叫，你学习。