The efficacious help is the delight that is greater: victorious delight
Thesis LXIII. So he places that efficacious aid of divine grace not in just any delight in the good, but in a delight that, in the person to whom it is given, is greater than every opposing delight and overcomes it; and for this reason he calls it, with Augustine, 'victorious delight'.
If the delight of the flesh is greater, the delight that the spirit pours in will never win the will's consent. A lesser delight cannot overcome a greater; the mind follows whichever delight has held it more strongly by the sweetness with which it touches it. De gratia Christi Salvatoris, book 4, chapter 6.
Latin
LXIII. Itaque illud efficax adjutorium divinae gratiae non in qualibet circa bonum delectatione ponit, sed in tali delectatione, quae in homine cui datur, omni delectatione opposita major sit, atque illam superet; & quam idcirco, cum Augustino, vocat Victricem delectationem. Si enim major sit carnis delectatio, nunquam illa quam spiritus infundit, a voluntate consensum impetrabit. Nam minor delectatio non potest majorem vincere: sed eam sequitur animus, quae magis eum afficiendo suavitate detinuerit. De gratia Christi salvat. lib. 4. cap. 6.