HOW ONE CREATURE MOVES ANOTHER (FOUR ARTICLES)
We next consider how one creature moves another. This consideration will be threefold: (1) How the angels move, who are purely spiritual creatures; (2) How bodies move; (3) How man moves, who is composed of a spiritual and a corporeal nature.
Concerning the first point, there are three things to be considered: (1) How an angel acts on an angel; (2) How an angel acts on a corporeal nature; (3) How an angel acts on man.
The first of these raises the question of the enlightenment and speech of the angels; and of their mutual coordination, both of the good and of the bad angels.
Concerning their enlightenment there are four points of inquiry:
(1) Whether one angel moves the intellect of another by enlightenment?
(2) Whether one angel moves the will of another?
(3) Whether an inferior angel can enlighten a superior angel?
(4) Whether a superior angel enlightens an inferior angel in all that he knows himself?
Whether one angel enlightens another?
Objection 1: It would seem that one angel does not enlighten another. For the angels possess now the same beatitude which we hope to obtain. But one man will not then enlighten another, according to Jer. 31:34 : "They shall teach no more every man his neighbor, and every man his brother." Therefore neither does an angel enlighten another now.
Objection 2: Further, light in the angels is threefold; of nature, of grace, and of glory. But an angel is enlightened in the light of nature by the Creator; in the light of grace by the Justifier; in the light of glory by the Beatifier; all of which comes from God. Therefore one angel does not enlighten another.
Objection 3: Further, light is a form in the mind. But the rational mind is "informed by God alone, without created intervention," as Augustine says (QQ. 83, qu. 51). Therefore one angel does not enlighten the mind of another.
On the contrary, Dionysius says (Coel. Hier. viii) that "the angels of the second hierarchy are cleansed, enlightened and perfected by the angels of the first hierarchy."
I answer that, One angel enlightens another. To make this clear, we must observe that intellectual light is nothing else than a manifestation of truth, according to Eph. 5:13 : "All that is made manifest is light." Hence to enlighten means nothing else but to communicate to others the manifestation of the known truth; according to the Apostle ( Eph. 3:8 ): "To me the least of all the saints is given this grace . . . to enlighten all men, that they may see what is the dispensation of the mystery which hath been hidden from eternity in God." Therefore one angel is said to enlighten another by manifesting the truth which he knows himself. Hence Dionysius says (Coel. Hier. vii): "Theologians plainly show that the orders of the heavenly beings are taught Divine science by the higher minds."
Now since two things concur in the intellectual operation, as we have said (Q[105], A[3]), namely, the intellectual power, and the likeness of the thing understood; in both of these one angel can notify the known truth to another. First, by strengthening his intellectual power; for just as the power of an imperfect body is strengthened by the neighborhood of a more perfect body ---for instance, the less hot is made hotter by the presence of what is hotter; so the intellectual power of an inferior angel is strengthened by the superior angel turning to him: since in spiritual things, for one thing to turn to another, corresponds to neighborhood in corporeal things. Secondly, one angel manifests the truth to another as regards the likeness of the thing understood. For the superior angel receives the knowledge of truth by a kind of universal conception, to receive which the inferior angel's intellect is not sufficiently powerful, for it is natural to him to receive truth in a more particular manner. Therefore the superior angel distinguishes, in a way, the truth which he conceives universally, so that it can be grasped by the inferior angel; and thus he proposes it to his knowledge. Thus it is with us that the teacher, in order to adapt himself to others, divides into many points the knowledge which he possesses in the universal. This is thus expressed by Dionysius (Coel. Hier. xv): "Every intellectual substance with provident power divides and multiplies the uniform knowledge bestowed on it by one nearer to God, so as to lead its inferiors upwards by analogy."
Reply to Objection 1: All the angels, both inferior and superior, see the Essence of God immediately, and in this respect one does not teach another. It is of this truth that the prophet speaks; wherefore he adds: "They shall teach no more every man his brother, saying: 'Know the Lord': for all shall know Me, from the least of them even to the greatest." But all the types of the Divine works, which are known in God as in their cause, God knows in Himself, because He comprehends Himself; but of others who see God, each one knows the more types, the more perfectly he sees God. Hence a superior angel knows more about the types of the Divine works than an inferior angel, and concerning these the former enlightens the latter; and as to this Dionysius says (Div. Nom. iv) that the angels "are enlightened by the types of existing things."
Reply to Objection 2: An angel does not enlighten another by giving him the light of nature, grace, or glory; but by strengthening his natural light, and by manifesting to him the truth concerning the state of nature, of grace, and of glory, as explained above.
Reply to Objection 3: The rational mind is formed immediately by God, either as the image from the exemplar, forasmuch as it is made to the image of God alone; or as the subject by the ultimate perfecting form: for the created mind is always considered to be unformed, except it adhere to the first truth; while the other kinds of enlightenment that proceed from man or angel, are, as it were, dispositions to this ultimate form.
Whether one angel moves another angel's will?
Objection 1: It would seem that one angel can move another angel's will. Because, according to Dionysius quoted above (A[1]), as one angel enlightens another, so does he cleanse and perfect another. But cleansing and perfecting seem to belong to the will: for the former seems to point to the stain of sin which appertains to will; while to be perfected is to obtain an end, which is the object of the will. Therefore an angel can move another angel's will.
Objection 2: Further, as Dionysius says (Coel. Hier. vii): "The names of the angels designate their properties." Now the Seraphim are so called because they "kindle" or "give heat": and this is by love which belongs to the will. Therefore one angel moves another angel's will.
Objection 3: Further, the Philosopher says (De Anima iii, 11) that the higher appetite moves the lower. But as the intellect of the superior angel is higher, so also is his will. It seems, therefore, that the superior angel can change the will of another angel.
On the contrary, To him it belongs to change the will, to whom it belongs to bestow righteousness: for righteousness is the rightness of the will. But God alone bestows righteousness. Therefore one angel cannot change another angel's will.
I answer that, As was said above (Q[105], A[4]), the will is changed in two ways; on the part of the object, and on the part of the power. On the part of the object, both the good itself which is the object of the will, moves the will, as the appetible moves the appetite; and he who points out the object, as, for instance, one who proves something to be good. But as we have said above (Q[105], A[4]), other goods in a measure incline the will, yet nothing sufficiently moves the will save the universal good, and that is God. And this good He alone shows, that it may be seen by the blessed, Who, when Moses asked: "Show me Thy glory," answered: "I will show thee all good" ( Exod. 33:18 , 19 ). Therefore an angel does not move the will sufficiently, either as the object or as showing the object. But he inclines the will as something lovable, and as manifesting some created good ordered to God's goodness. And thus he can incline the will to the love of the creature or of God, by way of persuasion.