The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.

The key to successful investing is to have a diversified portfolio.

"The only thing necessary for the triumph of evil is for good men to do nothing."

真正的挑战不是种得更多，而是用更少的资源种得更好。