Dionysius says (De Mystica Theol.
i) that whoever is the more united to God in this life, is united to
Him as to one entirely unknown. He says the same of Moses, who
nevertheless obtained a certain excellence by the knowledge conferred
by grace. But to be united to God while ignoring of Him "what He is,"
comes about also by natural reason. Therefore God is not more known to
us by grace than by natural reason.

Obj. 2: Further, we can acquire the knowledge of divine things by
natural reason only through the imagination; and the same applies to
the knowledge given by grace. For Dionysius says (Coel. Hier. i) that
"it is impossible for the divine ray to shine upon us except as
screened round about by the many colored sacred veils." Therefore we
cannot know God more fully by grace than by natural reason.

Obj. 3: Further, our intellect adheres to God by grace of faith.
But faith does not seem to be knowledge; for Gregory says (Hom. xxvi
in Ev.) that "things not seen are the objects of faith, and not of
knowledge." Therefore there is not given to us a more excellent
knowledge of God by grace.

_On the contrary,_ The Apostle says that "God hath revealed to us His
spirit," what "none of the princes of this world knew" (1 Cor. 2:10),
namely, the philosophers, as the gloss expounds.

_I answer that,_ We have a more perfect knowledge of God by grace than
by natural reason. Which is proved thus. The knowledge which we have
by natural reason contains two things: images derived from the
sensible objects; and the natural intelligible light, enabling us to
abstract from them intelligible conceptions.

Now in both of these, human knowledge is assisted by the revelation of
grace. For the intellect's natural light is strengthened by the
infusion of gratuitous light; and sometimes also the images in the
human imagination are divinely formed, so as to express divine things
better than those do which we receive from sensible objects, as
appears in prophetic visions; while sometimes sensible things, or even
voices, are divinely formed to express some divine meaning; as in the
Baptism, the Holy Ghost was seen in the shape of a dove, and the voice
of the Father was heard, "This is My beloved Son" (Matt. 3:17).

Reply Obj. 1: Although by the revelation of grace in this life we
cannot know of God "what He is," and thus are united to Him as to one
unknown; still we know Him more fully according as many and more
excellent of His effects are