Cap. 1 prol. IV: distinguishing conditions defined — free-will use
A few words now on distinguishing conditions. IV. By distinguishing conditions I mean contrary acts or qualities which, when foresight and weighed beforehand in the subject, bring about contrary acts in God toward that same subject. Take free choice: its good use and its bad use are contrary acts. If someone holds that, by God's ordination, foresight of the good use always means predestination, and foresight of the bad use means reprobation, then that person makes the good and bad use of free choice into distinguishing conditions required in the subject of predestination or reprobation.
Latin
Jam de conditionibus distinguentibus pauca etiam dicenda sunt. IV. Conditiones distinguentes appello, contrarios actus aut qualitates, quibus in subjecto praevisis & praeconsideratis, contrarii actus etiam in Deo circa idem subjectum exercentur. Verbi causa, bonus usus liberi arbitrii, & malus usus liberi arbitrii sunt actus contrarii: Si quis ergo sentiat ex praevisione boni usus secundum Dei ordinationem homines semper praedestinari, ex praevisione mali usus reprobari, is facit bonum & malum usum liberi arbitrii conditiones distinguentes in subjecto praedestinationis aut reprobationis requisitas.