A man is rich in proportion to the number of things which he can afford to let alone. That man is the richest whose pleasures are the cheapest.

The most dangerous thing is to do nothing.

当你做出一个新的、一致的和坚定的决定时，你的生活就会改变。

I don’t let other people define who I am.

You have to keep thinking about what you can do to make the world a better place.