战国时鲁国有个姓乐正(yuè zhèng复姓)名子春的人,是曾子的学生。有一天,乐正子春从堂屋出来下台阶的时候,不小心弄伤了脚。脚伤不久就好了。但乐正子春却因为此事几个月都不出门,脸上还一直带着忧虑和不安。他的弟子禁不住问道:“老师,您的脚早就痊愈了,可您几个月都不出门,还这样忧虑不安,这是为什么呢?”乐正子春听罢,大声回 Warring States period Luguo have a surname (yuè zhèng hyphenated name) Name Spring, is a student of Zeng. One day, LZZ spring out from the church when the next step, accidentally injured his foot. Foot injury soon enough. But Lok Masako spring but because the matter a few months do not go out, his face has always been with anxiety and anxiety. His disciples could not help but ask: “Teacher, your feet have long been healed, but you do not go out for a few months, but also so worried and anxiety, which is why?”