A passage from Posidonius
Posidonius, (in Galen, On the Doctrines of Hippocrates and Plato) 4.7
✱
Posidonius held that the passions arise from an unruly power in the soul, and must be curbed by reason.
Related passages
✱
Begin the morning by saying to thyself, I shall meet with the busy-body, the ungrateful, arrogant, deceitful, envious, unsocial.
✱
Men seek retreats for themselves, houses in the country, sea-shores, and mountains... But this is altogether a mark of the most common sort of men, for it is in thy power whenever thou shalt choose to retire into thyself.
✱
Take away thy opinion, and then there is taken away the complaint, 'I have been harmed.' Take away the complaint, and the harm is taken away.