The only limits that exist are the ones you place on yourself.

如果你想过得快乐，就把生活跟目标联系在一起，而不是跟人或物质。

我没有计划。我从来没有。我只是做当时感觉对的事情。

We begin with the hypothesis that any subject can be taught effectively in some intellectually honest form to any child at any stage of development.

凡是有不和的地方，我们要为和谐而努力；凡是有谬误的地方，我们要为真理而努力；凡是有疑虑的地方，我们要为信任而努力；凡是有绝望的地方，我们要为希望而努力。

The most basic human desire is to be recognized as a human being.

The customer may not always be right, but they are always the customer.