Thesis XXI. He adds that when God withholds grace from people he withholds it justly, because by their own fault they have made themselves unworthy of it. So its absence cannot excuse their inability to do good.
It would be different, he says, if God deprived a creature free of all sin of the aids it needs to act rightly. Then the creature would bear no blame, since in that respect it would simply be following the order God had set, and could not be said to have departed from it.
Latin
XXI. Quibus addit, gratiam iis quibus negatur juste a Deo negari, propterea quod culpa sua indignos se ea reddiderunt, unde est quod ejus carentia non possit excusare eorum impotentiam ad benefaciendum. Secus vero futurum si Deus creaturam omni peccato carentem destitueret auxiliis necessariis ad bene agendum: tum enim nullam fore in creatura culpam, quoniam in eo sequeretur Dei institutionem, nec dici posset ab ea recessisse.