Meditations 7:55

Don't pay attention to other people's minds. Look straight ahead, where nature is leading you—nature in general, through the things that happen to you; and your own nature, through your own actions.

Everything has to do what it was made for. And other things were made for those with logos. In this respect as in others: lower things exist for the sake of higher ones, and higher things for one another.

Now, the main thing we were made for is to work with others.

Secondly, to resist our body's urges. Because things driven by logos—by thought—have the capacity for detachment—to resist impulses and sensations, both of which are merely corporeal. Thought seeks to be their master, not their subject. And so it should: they were created for its use.

And the third thing is to avoid rashness and credulity.

The mind that grasps this and steers straight ahead should be able to hold its own.