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Ἐν δὲ δικαιοσύνῃ συλλήβδην πᾶσ' ἀρετὴ ἔνι → Justice contains in itself all the virtues
ἐπισταλτική: ἡ (sc. πτῶσις) грам. дательный падеж.
η δοτική.