我们不是靠运气，而是靠勤奋和智慧走到今天的。

In times of change, the learners will inherit the earth while the knowers will find themselves beautifully equipped to deal with a world that no longer exists.

I try to make the invisible visible.

每本书都是作者和读者之间的对话。

To be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others.

当我们想到过去时，我们挑选的是美好的事物。我们想相信一切都是那样的。