I am not an Athenian or a Greek，but a citizen of the world.

Boundaries define us. They define what is me and what is not me. A boundary shows me where I end and someone else begins, leading me to a sense of ownership.

The course of development consists simply in this; that in each generation the two parental traits appear, separated and unchanged.

不要让恐惧阻止你追逐梦想。

图书馆里充满了思想——也许是最危险和最强大的武器。