《文心雕龙·论说》
这些文体虽然存在着名称上的区别，但都是论述道理的。所谓 论 ，综合各家说法，即深入探讨某一义理的文章。
论也者，弥纶群言，而研精一理者也。
Although there are differences in the names of these genres, they all serve the purpose of expounding principles. The term lun, in a general sense, refers to articles that expound on a certain principle or idea.