Book X · 23
Let this always be plain to thee, that this piece of land is like any other; and that all things here are the same with things on the top of a mountain, or on the sea-shore, or wherever thou choosest to be. For thou wilt find just what Plato says, Dwelling within the walls of a city as in a shepherd's fold on a mountain.
Marcus Aurelius, Meditations X.23. Translated by George Long (1862). The Stoic Library.