Meditations 10:6

Whether it's atoms or nature, the first thing to be said is this: I am a part of a world controlled by nature. Secondly:

that I have a relationship with other, similar parts. And with that in mind I have no right, as a part, to complain about what is assigned me by the whole. Because what benefits the whole can't harm the parts, and the whole does nothing that doesn't benefit it. That's a trait shared by all natures, but the nature of the world is defined by a second characteristic as well: no outside force can compel it to cause itself harm.

So by keeping in mind the whole I form a part of, I'll accept whatever happens. And because of my relationship to other parts, I will do nothing selfish, but aim instead to join them, to direct my every action toward what benefits us all and to avoid what doesn't. If I do all that, then my life should go smoothly. As you might expect a citizen's life to go—one whose actions serve his fellow citizens, and who embraces the community's decree.