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 to be obeyed.
解释：咸味食物走血分，血病的人不宜多食，说明饮食需根据病症调整。
Management brings benefits, details determine success or failure.