You cannot get through a single day without having an impact on the world around you. What you do makes a difference, and you have to decide what kind of difference you want to make.

忠于自己，永远不要让任何人告诉你你做不到某件事。

The meaning of a word is not a mental entity， but a social practice.

真正的美国发现还在我们面前。我们精神、我们人民、我们强大而不朽的土地的真正实现尚未到来。