Thesis XL. Other Reformed theologians, however, generally reject the distinction of grace into sufficient and efficacious. In their judgment no grace is really sufficient, or can be called so, unless it is also efficacious.
Their reason is that for a person to be actually converted, God must give a help that does more than simply move and draw him toward the good: it must bend and determine his will to will the good and hold to it. Without such help the will would never be carried there, since man's inborn depravity blocks the way.
Latin
XL. Verum alii Reformati gratiae distinctionem in sufficientem atque efficacem communiter repudiant. Quippe censent nullam gratiam revera sufficientem esse & dici posse, quae etiam non sit efficax. Idque quia ut homo reapse convertatur, requiritur tale Dei auxilium, quo non simpliciter ad bonum moveatur & alliciatur, sed quo voluntas ejus flectatur & determinetur, ut bonum velit & illi adhaereat, absque quo nunquam foret, ut eo ferretur voluntas, obstante ingenita hominis pravitate.