Cap. VIII Arg. 2 Resp.: demerit frees from cruelty charge, not motive of Jacob/Esau discrimination
Note also: we gladly grant that in the reprobate subject there resides that contagion and unworthiness which can free the reprobating God not only from cruelty and injustice, but even from the lightest suspicion of them. Whoever is denied this special mercy had no right that such grace be prepared or conferred. What is owed by no reason is reasonably denied — so Thomas. Add that he not only has no right to such a benefit, but by inborn vice is as it were proximately disposed to receive God's vengeance (Augustine, Against two Letters of the Pelagians 2.7). The state of the whole human race as presented to God electing and passing by is a state of sin, death, and merited damnation. But since that state is common to all and wraps Jacob as much as Esau, it can stand as a congruent reason why God may justly leave both — not as the moving cause why he rejected Esau while electing Jacob, who stood in the same condition. Hence Dionysius the Carthusian calls it intolerable that foresight of demerits be named the reason of reprobation.
Latin
Porro et illud notandum est, nos libenter agnoscere, in subjecto reprobato residere illam contagionem et indignitatem quae possit Deum reprobantem non modo ab omni crudelitate et injustitia, sed vel a levissima ejus suspicione, liberare. Nam cuicunque negatur haec specialis misericordia, certum est, non habuisse illum jus ad hoc, quod gratia talis ei praeparetur aut conferatur. Rationabiliter autem negatur quod nulla ratione debetur, ut recte Thomas. Huc accedit, quod non modo nullum jus habet ad tale beneficium, sed est suo insito vitio quasi proxime dispositus ad vindictam Dei excipiendam. Hoc Augustinus optime explicavit, Contra 2. Epist. Pelag. lib. 2, cap. 7. Status enim totius generis humani Deo eligenti et praetereunti repraesentatus, est status peccati, status mortis et meritae damnationis. Verum cum hic status communis sit omnium, tamque Jacobum involvat quam Esavum, potest afferri ut ratio congrua cur Deus utrumque juste possit relinquere, sed non potest commode obtendi ut causa motiva cur Esavum rejecerit, electo Jacobo, qui in eadem fuit conditione. Atque hinc Dionysius Carthusianus intolerabile esse affirmat, ut praescientia demeritorum dicatur ratio reprobationis.