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Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη → The first and best victory is to conquer self.
ἐθελοντεί: ἐθελουσίως, Δίων Κ. 52. 29.
espontáneamente, voluntariamente