On the contrary, The Apostle says ( Eph. 1:20 , 21 ) that "God has set the Man Christ above all principality and power, and virtue, and dominion": which are the various orders of the angels, and some of them belong to one hierarchy, as will be explained (A[6]).
I answer that, As explained above, one hierarchy is one principality---that is, one multitude ordered in one way under the rule of a prince. Now such a multitude would not be ordered, but confused, if there were not in it different orders. So the nature of a hierarchy requires diversity of orders.
This diversity of order arises from the diversity of offices and actions, as appears in one city where there are different orders according to the different actions; for there is one order of those who judge, and another of those who fight, and another of those who labor in the fields, and so forth.
But although one city thus comprises several orders, all may be reduced to three, when we consider that every multitude has a beginning, a middle, and an end. So in every city, a threefold order of men is to be seen, some of whom are supreme, as the nobles; others are the last, as the common people, while others hold a place between these, as the middle-class [populus honorabilis]. In the same way we find in each angelic hierarchy the orders distinguished according to their actions and offices, and all this diversity is reduced to three---namely, to the summit, the middle, and the base; and so in every hierarchy Dionysius places three orders (Coel. Hier. vi).
Reply to Objection 1: Order is twofold. In one way it is taken as the order comprehending in itself different grades; and in that way a hierarchy is called an order. In another way one grade is called an order; and in that sense the several orders of one hierarchy are so called.
Reply to Objection 2: All things are possessed in common by the angelic society, some things, however, being held more excellently by some than by others. Each gift is more perfectly possessed by the one who can communicate it, than by the one who cannot communicate it; as the hot thing which can communicate heat is more perfect that what is unable to give heat. And the more perfectly anyone can communicate a gift, the higher grade he occupies, as he is in the more perfect grade of mastership who can teach a higher science. By this similitude we can reckon the diversity of grades or orders among the angels, according to their different offices and actions.
Reply to Objection 3: The inferior angel is superior to the highest man of our hierarchy, according to the words, "He that is the lesser in the kingdom of heaven, is greater than he"---namely, John the Baptist, than whom "there hath not risen a greater among them that are born of women" ( Mat. 11:11 ). Hence the lesser angel of the heavenly hierarchy can not only cleanse, but also enlighten and perfect, and in a higher way than can the orders of our hierarchy. Thus the heavenly orders are not distinguished by reason of these, but by reason of other different acts.
Whether there are many angels in one order?
Objection 1: It seems that there are not many angels in one order. For it was shown above (Q[50], A[4]), that all the angels are unequal. But equals belong to one order. Therefore there are not many angels in one order.
Objection 2: Further, it is superfluous for a thing to be done by many, which can be done sufficiently by one. But that which belongs to one angelic office can be done sufficiently by one angel; so much more sufficiently than the one sun does what belongs to the office of the sun, as the angel is more perfect than a heavenly body. If, therefore, the orders are distinguished by their offices, as stated above (A[2]), several angels in one order would be superfluous.
Objection 3: Further, it was said above (OBJ 1) that all the angels are unequal. Therefore, if several angels (for instance, three or four), are of one order, the lowest one of the superior order will be more akin to the highest of the inferior order than with the highest of his own order; and thus he does not seem to be more of one order with the latter than with the former. Therefore there are not many angels of one order.
On the contrary, It is written: "The Seraphim cried to one another" ( Is. 6:3 ). Therefore there are many angels in the one order of the Seraphim.
I answer that, Whoever knows anything perfectly, is able to distinguish its acts, powers, and nature, down to the minutest details, whereas he who knows a thing in an imperfect manner can only distinguish it in a general way, and only as regards a few points. Thus, one who knows natural things imperfectly, can distinguish their orders in a general way, placing the heavenly bodies in one order, inanimate inferior bodies in another, plants in another, and animals in another; whilst he who knows natural things perfectly, is able to distinguish different orders in the heavenly bodies themselves, and in each of the other orders.
Now our knowledge of the angels is imperfect, as Dionysius says (Coel. Hier. vi). Hence we can only distinguish the angelic offices and orders in a general way, so as to place many angels in one order. But if we knew the offices and distinctions of the angels perfectly, we should know perfectly that each angel has his own office and his own order among things, and much more so than any star, though this be hidden from us.
Reply to Objection 1: All the angels of one order are in some way equal in a common similitude, whereby they are placed in that order; but absolutely speaking they are not equal. Hence Dionysius says (Coel. Hier. x) that in one and the same order of angels there are those who are first, middle, and last.
Reply to Objection 2: That special distinction of orders and offices wherein each angel has his own office and order, is hidden from us.
Reply to Objection 3: As in a surface which is partly white and partly black, the two parts on the borders of white and black are more akin as regards their position than any other two white parts, but are less akin in quality; so two angels who are on the boundary of two orders are more akin in propinquity of nature than one of them is akin to the others of its own order, but less akin in their fitness for similar offices, which fitness, indeed, extends to a definite limit.
Whether the distinction of hierarchies and orders comes from the angelic nature?
Objection 1: It would seem that the distinction of hierarchies and of orders is not from the nature of the angels. For hierarchy is "a sacred principality," and Dionysius places in its definition that it "approaches a resemblance to God, as far as may be" (Coel. Hier. iii). But sanctity and resemblance to God is in the angels by grace, and not by nature. Therefore the distinction of hierarchies and orders in the angels is by grace, and not by nature.
Objection 2: Further, the Seraphim are called "burning" or "kindling," as Dionysius says (Coel. Hier. vii). This belongs to charity which comes not from nature but from grace; for "it is poured forth in our hearts by the Holy Ghost Who is given to us" ( Rom. 5:5 ): "which is said not only of holy men, but also of the holy angels," as Augustine says (De Civ. Dei xii). Therefore the angelic orders are not from nature, but from grace.
Objection 3: Further, the ecclesiastical hierarchy is copied from the heavenly. But the orders among men are not from nature, but by the gift of grace; for it is not a natural gift for one to be a bishop, and another a priest, and another a deacon. Therefore neither in the angels are the orders from nature, but from grace only.
On the contrary, The Master says (ii, D. 9) that "an angelic order is a multitude of heavenly spirits, who are likened to each other by some gift of grace, just as they agree also in the participation of natural gifts." Therefore the distinction of orders among the angels is not only by gifts of grace, but also by gifts of nature.
I answer that, The order of government, which is the order of a multitude under authority, is derived from its end. Now the end of the angels may be considered in two ways. First, according to the faculty of nature, so that they may know and love God by natural knowledge and love; and according to their relation to this end the orders of the angels are distinguished by natural gifts. Secondly, the end of the angelic multitude can be taken from what is above their natural powers, which consists in the vision of the Divine Essence, and in the unchangeable fruition of His goodness; to which end they can reach only by grace; and hence as regards this end, the orders in the angels are adequately distinguished by the gifts of grace, but dispositively by natural gifts, forasmuch as to the angels are given gratuitous gifts according to the capacity of their natural gifts; which is not the case with men, as above explained (Q[62], A[6]). Hence among men the orders are distinguished according to the gratuitous gifts only, and not according to natural gifts.
From the above the replies to the objections are evident.
Whether the orders of the angels are properly named?