ὁ δὲ πείσεται εἰς ἀγαθόν περ → he will obey you to his profit, he will obey you for his own good end
biassed: P. οὐ κοινός; see biassed.
from interested motives: P. and V. ἐπὶ κέρδεσι.
partly responsible: P. and V. συναίτιος, μεταίτιος (gen.).