《论衡·卷十·非韩篇》
凡是人对他亲爱的人，知道他病了就会忧愁，知道他快要死了就会担心，已经死了就会悲哀。
凡人於其所亲爱也，知病而忧，临死而惧，已死而哀。
Anyone who cares about his loved one will be sad when he gets sick, worried when he is about to die, and grieved when he has died.