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.

If you want to achieve greatness, stop asking for permission.

【解释】不是自己分内应享受的幸福，无缘无故得到意外之财，即便不是上天的诱饵，也是诈骗的陷阱，不睁大眼睛，就会落入圈套中。

实现明天的唯一限制是我们今天的疑虑。