Epictetus, Works, book 3, Περὶ τοῦ μὴ δεῖν προσπάσχειν τοῖσ οὐκ ἐφ’ ἡμῖν. 111:

οἱο͂ν γάρ ἐστιν αὐτὸν αὑτῷ δύνασθαι εἰπεῖν "νῦν ἃ οἱ ἄλλοι ἐν ταῖσ σχολαῖσ σεμνολογοῦσιν καὶ παραδοξολογεῖν δοκοῦσι, ταῦτα ἐγὼ ἐπιτελῶ· κἀκεῖνοι καθήμενοι τὰσ ἐμὰσ ἀρετὰσ ἐξηγοῦνται καὶ περὶ ἐμοῦ ζητοῦσιν καὶ ἐμὲ ὑμνοῦσιν·