《论衡·卷三·物势篇》
使万物互相残害，正是为了让它们相互依存。因此天用五行之气造就万物，人又用万物做成各种各样的事。
故天用五行之气生万物，人用万物作万事。
Killing each other is just for the purpose of making them depend on each other. So Heaven creates every thing with the five elements, and man makes various things with every thing.