Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

The future belongs to those who are willing to challenge the status quo.

解释：对会带来灾祸的事物不喜欢，就不会招致灾祸。

I am always glad to think that my education was, for the most part, informal, and had its roots in the soil.