《颜氏家训·勉学篇》
古时候求学的人都是为了充实自己，以弥补自己的不足；现在求学的人都是为了别人的称赞，只能说说罢了。
古之学者为己，以补不足也；今之学者为人，但能说之也。
People who studied in ancient times all did so to enrich themselves and make up for their shortcomings. People who study now all do so for the praise of others and only talk about it.