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.
冒险是必要的,但经过计算的冒险才是天才之举。
The only thing that can make you successful is your own effort.