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.

释义：日月依天而行，百谷草木依附地而生存。

成功不是终点，失败也非致命，重要的是继续前进的勇气。