那年哲学流行的时候司马牛立即变得很忧郁:人家都有兄弟,为什么偏偏我是独生子呢?古时候的人很淳朴,相信用政治思想工作可以解决生理卫生问题。司马牛的师兄子夏就劝他:人家说死生有命富贵在天,况且一个君子,四海之内皆兄弟嘛。为了保持忧郁,司马牛把自己的问题换成了“如何成为一个君子”。 When the popular philosophy of Sima cow immediately became very melancholy: people have brothers, why did I choose to be the only child? In ancient times, people are very honest, I believe that with the political and ideological work can solve the problem of physical health. Sima cow’s brothers and sons Xia to persuade him: people say life and death wealthy in heaven, Moreover, a gentleman, universally brother are all brothers. In order to remain depressed, Sima Niu replaced his own question with “How to Become a Gentleman.”