Why the Remonstrants call such grace merely sufficient
Thesis LXVIII. The Remonstrants, for their part, do not divide grace into sufficient and efficacious because they think that the grace received by those who stay unbelieving and go on in their sins lacks the force and efficacy needed beforehand for their conversion to follow, so that it earns only the name 'sufficient' and not 'efficacious'.
They grant that those who reject the Gospel preached to them lack no help they need to come to faith. They refuse the name 'efficacious' to the grace these people share in for one reason only: it does not in fact produce in them the effect it is meant for, because of the hindrance such people set up, not because grace itself lacks the force and efficacy required.
Latin
LXVIII. Contra vero Remonstrantes non ideo gratiam distinguunt in sufficientem atque efficacem, quod putent gratiam quam accipiunt illi qui increduli manent, & in peccatis perseverant, non habere vim & efficaciam necessariam & praerequisitam ad hoc, ut sequatur in illis conversio, ac propterea solum nomen sufficientis, non vero etiam efficacis mereri. Agnoscunt enim illos qui Evangelium sibi praedicatum respuunt, nullo carere auxilio ad concipiendam fidem necessario; sed ideo solum gratiae cujus sunt participes denegant efficacis nomen, quod effectum ad quem destinatur in iis reapse non producat, propter impedimentum quod illi ponunt homines ejusmodi, non ipsi gratiae vis & efficacia necessaria desit.