I constantly see people rise in life who are not the smartest, sometimes not even the most diligent, but they are learning machines. They go to bed every night a little wiser than they were when they got up and boy does that help, particularly when you have a long run ahead of you.

镜子经过淬炼会越来越明亮，钢铁经过锤炼会越来越坚硬。

幸福的秘密是自由，自由的秘密是勇气。