We are not disturbed by what happens to us, but by our thoughts about what happens to us.
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Original Citation
Epictetus. Ἐγχειρίδιον Ἐπικτήτου, Enkheirídion Epiktḗtou [Enchiridion of Epictetus]. c. 125 CE, ch. 5.
Current Citation
Epictetus. Enchiridion, translated by George Long. Dover Publications, 2004, ch. 5.