en.

Under the first head there are four points of inquiry:

(1) Whether an angel can enlighten the human intellect?

(2) Whether he can change man's will?

(3) Whether he can change man's imagination?

(4) Whether he can change man's senses?
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FIRST ARTICLE [I, Q. 111, Art. 1]

Whether an Angel Can Enlighten Man?

Objection 1: It would seem that an angel cannot enlighten man. For
man is enlightened by faith; hence Dionysius (Eccl. Hier. iii)
attributes enlightenment to baptism, as "the sacrament of faith." But
faith is immediately from God, according to Eph. 2:8: "By grace you
are saved through faith, and that not of yourselves, for it is the
gift of God." Therefore man is not enlightened by an angel; but
immediately by God.

Obj. 2: Further, on the words, "God hath manifested it to them" (Rom.
1:19), the gloss observes that "not only natural reason availed for
the manifestation of Divine truths to men, but God also revealed them
by His work," that is, by His creature. But both are immediately from
God--that is, natural reason and the creature. Therefore God
enlightens man immediately.

Obj. 3: Further, whoever is enlightened is conscious of being
enlightened. But man is not conscious of being enlightened by angels.
Therefore he is not enlightened by them.

_On the contrary,_ Dionysius says (Coel. Hier. iv) that the
revelation of Divine things reaches men through the ministry of the
angels. But such revelation is an enlightenment as we have stated
(Q. 106, A. 1; Q. 107, A. 2). Therefore men are enlightened by the
angels.

_I answer that,_ Since the order of Divine Providence disposes that
lower things be subject to the actions of higher, as explained above
(Q. 109, A. 2); as the inferior angels are enlightened by the
superior, so men, who are inferior to the angels, are enlightened by
them.

The modes of each of these kinds of enlightenment are in one way
alike and in another way unlike. For, as was shown above (Q. 106, A.
1), the enlightenment which consists in making known Divine truth has
two functions; namely, according as the inferior intellect is
strengthened by the action of the superior intellect, and according
as the intelligible species which are in the superior intellect are
proposed to the inferior so as to be grasped thereby. This takes
place in the angels when the superior angel divides his universal
concept of the truth according to the capacity of the inferior a