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.

商业的成功来自于平衡短期收益与长期愿景。

沉默可能是最有说服力的回答。