Second sense: with all prerequisites, even divine motion, the act may not follow and its contrary may
A second possible sense of the description is this. Given everything required beforehand for some act of the free will, on the side of the object, on the side of God, and on the side of the intellect, that act can just as well not follow as follow, and an opposite act can even take its place.
An act cannot be combined or joined with its own absence or with the opposite act. But all that is required beforehand for some act of the human will, say conversion and the love of God, can be joined with the absence of that act and even with the act opposed to it, and often actually is.
Thus, whatever the light and even the attraction of the object, whatever the dictate and judgment of the intellect, and finally whatever divine motion urges toward conversion while still preceding the will's own actual determination, conversion may in fact not follow.
It often does happen that, with all these things exactly alike, conversion goes with them in one person and not at all in another, because the will determined itself one way in the first and otherwise in the second.
Latin
XLVI. Secundo vero hujus descriptionis hic sensus esse potest, quod positis omnibus quae praerequiruntur ad actum aliquem voluntatis liberae, tam ex parte objecti, quam ex parte Dei, & intellectus ipsius, possit actus ille tam non sequi quam sequi, & etiam contrarius actus in ejus locum substitui: ita ut, quamvis componi & conjungi non possint actus aliquis & ejus privatio, vel contrarius actus; tamen cum omnibus illis quae praerequiruntur ad aliquem actum Humanae voluntatis verbi causa, conversionis, & dilectionis Dei, conjungi possit, & saepe de facto conjungatur, illius actus privatio, & actus etiam illi oppositus: Et sic, non obstante quocunque objecti lumine, & etiam illecebra, quocunque dictamine & judicio intellectus, ac denique quacunque divina motione, quae impellant ad conversionem, & tamen actualem voluntatis ipsius determinationem praecedant, possit reapse conversio non sequi; & saepe de facto contingat, ista omnia pari modo se habentia, in uno quidem habere junctam conversionem, in alio vero minime, propterea quod voluntas in uno se sic determinavit, in alio vero secus.