"Retire into yourself" — Seneca

Retire into yourself as much as you can; associate with those who will improve you.

Letters from a Stoic, Letter VII, 8

Source Book

Source book

Letters from a Stoic by Seneca

A city is not adorned by external things, but by the virtue of those who dwell in it.

Fragments

Accept the things to which fate binds you, and love the people with whom fate brings you together, and do so with all your heart.

Meditations, Book VI

That which is not good for the bee-hive cannot be good for the bees.

Meditations, Book 6