我不断地看到有些人在生活中越过越好，他们不是最聪明的，甚至不是最勤奋的，但他们是学习机器，他们每天夜里睡觉时都比那天早晨聪明一点点。

The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when it be obeyed.

The world is full of people who will tell you what you can't do. You don't need them. You already know what you can't do. What you need is someone to tell you what you can.