写作是一种勇气的行为。

The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.

The goal of education is not to increase the amount of knowledge but to create the possibilities for a child to invent and discover, to create men who are capable of doing new things.

因为宇宙的结构是最完美的，是一位最智慧的造物主的作品，所以在宇宙中发生的任何事情，无不体现出某些极大或极小的法则。