我什么都不发明，我只是重新发现。

If you want to see what this nation is all about, you have to ride the rails. Look outside as you speed through, and you’ll find the true face of America.

The best picture books work on different levels for different ages.

You don’t have to pee on an electric fence to learn not to do it.

所有卓越的事物都与它们的稀有性一样困难。