The only person you should try to be better than is the person you were yesterday.
解释:冬天不洗冰水,并不是吝惜冰;夏天不烤火,也不是舍不得火。而是因为这样做对身体不适宜。
学习必须是为了切实提升自己,这样才能安静专一,智慧日渐增长。