Usual rendering:
οὐ βιαστέον τὴν φύσιν ἀλλὰ πειστέον· πείσομεν δὲ τὰς ἀναγκαίας ἐπιθυμίας ἐκπληροῦντες, τάς τε φυσικὰς ἂν μὴ βλάπτωσι, τὰς δὲ βλαβερὰς πικρῶς ἐλέγχοντες.Nature must be persuaded, not forced. And we will persuade nature by fulfilling the necessary desires, and the natural desires too if they cause no harm, but sharply rejecting the harmful desires.