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Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη → The first and best victory is to conquer self.
ὑποκοριστικόν: τό (sc. ὄνομα) грам. уменьшительное или ласкательное имя.