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Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
inf. ao.2 de διαφέρω.
διενεγκεῖν: inf. aor. 2 к διαφέρω.