Letters 113.28

At this point I would quote you a saying of our philosopher Posidonius: “There are never any occasions when you need think yourself safe because you wield the weapons of Fortune; fight with your own! Fortune does not furnish arms against herself; hence men equipped against their foes are unarmed against Fortune herself.”

Seneca, Letters to Lucilius 113.28, translated by Richard Mott Gummere