A grace sufficient for one act is efficacious for another
Thesis XXXI. They do grant, however, that a grace which in one respect is only sufficient is efficacious in another. A grace that is sufficient for some complete act, toward which it disposes a person and to which it is directed, is efficacious for the incomplete acts by which a person is usually prepared for that complete act.
Indeed, on their view, although every sufficient grace is inefficacious for the full work for which it is called sufficient, it is most fully and most abundantly efficacious for the proximate and immediate act for which God gives and appoints it.
Latin
XXXI. Caeterum agnoscunt gratiam, quae uno respectu sufficiens tantum est, alio respectu esse efficacem. Nempe quae sufficiens est respectu actus alicujus perfecti, ad quem disponit, & ad quem ordinatur, efficax est respectu actuum imperfectorum, per quos homo ad actum illum perfectum disponi solet. Imo quamvis, ex eorum mente, omnis gratia sufficiens inefficax sit, ad plenum illud opus, ad quod dicitur esse sufficiens; est tamen plenissime & cumulatissime efficax ad actum proximum & immediatum, ad quem a Deo datur & destinatur.