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Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη → The first and best victory is to conquer self.
2ᵉ sg. impér. prés. de ἵσταμαι.
ἵστω: Soph., Arph. (= ἵστασο) 2 л. sing. imper. med. к ἵστημι.