Hence no grace is sufficient without being efficacious
Thesis IV. It follows that everyone who does not actually turn and do good lacks some divine aid that action requires and presupposes. Such people, then, should not be said to have sufficient grace for turning and doing good, since only what includes everything needed deserves the name sufficient.
Whoever has every aid that a good work requires beforehand will infallibly and surely perform it. So every grace that can truly be called sufficient is efficacious as well, and the Schools' custom of dividing the saving grace of Christ the Redeemer, which fallen humanity needs, into efficacious and sufficient is pointless.
Latin
IV. Unde sequitur omnibus qui actu non convertuntur & bene operantur, deesse aliquod divinum auxilium ad agendum necessarium atque praerequisitum; adeoque illos non debere dici gratiam sufficientem habere ut sese convertant & bene operentur: cum illud solum dici debeat sufficiens, quod necessaria omnia complectitur. Quicunque autem auxilia omnia ad bonum aliquod opus praevia & necessaria habet, illum infallibiliter & certo bene acturum: & sic omnem gratiam, quae vere dici possit sufficiens, etiam efficacem esse: ac proinde frustra gratiam salutarem Christi Redemptoris, quae lapso homini necessaria est, in Scholis solere distingui in efficacem & sufficientem.