The other reason is that what happens to the individual is a cause of well-being in what directs the world—of its well-being, its fulfillment, or its very existence, even. Because the whole is damaged if you cut away anything—anything at all—from its continuity and its coherence. Not only its parts, but its purposes. And that's what you're doing when you complain: hacking and destroying.

V, 7 - Meditations (c. 161–180 CE) - Book V (Hays translation)