当你解决一个数学问题时，你不仅得到了答案，还理解了为什么这是答案。

The key to success is to get out into the store and listen to what the associates have to say. It's terribly important for everyone to get involved. The best ideas come from the floor.

There is an awful lot you can tell about a person by their shoes. Where they're going. Where they've been.

The concept of infinity is both fascinating and perplexing.