Meditation 8.56
Marcus AureliusMeditationsBook 8.56
56. To my will the will of a neighbour is as indifferent as his vital spirit and his flesh. For even though we were brought into the world more than anything else for the sake of one another, still each of our governing selves has its own sovereign right; for otherwise the evil of my neighbour would surely be evil of mine, and that was not God's good pleasure, in order that my unhappiness might not depend on someone other than myself.