Letters 104.32

And this is the vote which he casts concerning them both: “If Caesar wins, I slay myself; if Pompey, I go into exile.” What was there for a man to fear who, whether in defeat or in victory, had assigned to himself a doom which might have been assigned to him by his enemies in their utmost rage? So he died by his own decision.

Seneca, Letters to Lucilius 104.32, translated by Richard Mott Gummere