For Deification, Contra Pantheism

As ever, Aquinas walks the holy middle road, presented by Rev. Father Barthelemy Froget, O.P.:

Before broaching the interesting yet difficult question of the indwelling of the Holy Ghost in the souls of the just, and of the mysterious union He thus effects with them; before going into the proofs of the presence both substantial and extraordinary of the three Divine persons in the just soul which thus becomes a living temple wherein the adorable Trinity finds delight, it will be useful, and, to a certain extent, even necessary, to grasp a few preliminary notions on the ordinary way in which God is present in all things. Nothing, indeed, could be more unreasonable than to expound the doctrine of the extraordinary or special presence of God in the souls of the just, before we know quite clearly what is His ordinary presence in all creation. To be in a fit position to speak in precise terms of these two kinds of presence, and to distinguish one from the other, we must first of all become acquainted with their respective characteristics, and see in what they agree and in what they differ. This may be achieved by carefully examining, defining and comparing their natures. Were we to follow a different course of action, plunging at once into a more or less scientific explanation of the indwelling of God in the soul by the life of grace, without having, at the outset, firmly established and clearly explained that such an indwelling is to be found nowhere else in nature, we should be in danger of imparting very incomplete notions, and of leaving the reader in a state of vagueness that could not but be regrettable. On the other hand, it will not be necessary to dwell at length on the proofs for the divine omnipresence, since all Catholics believe in it; we shall, however, insist on the way in which it is to be understood in order to convey an exact idea of God’s immensity, and so to prepare the way for a clear understanding of the special presence of God in the souls of the just...