Summa Theologica, Part I (Prima Pars) From the Complete...

Objection 1: It would seem that men are not guarded by the angels. For guardians are deputed to some because they either know not how, or are not able, to guard themselves, as children and the sick. But man is able to guard himself by his free-will; and knows how by his natural knowledge of natural law. Therefore man is not guarded by an angel.

Obj. 3: Further, the loss of the guarded redounds to the negligence of the guardian; hence it was said to a certain one: "Keep this man; and if he shall slip away, thy life shall be for his life" (3 Kings 20:39). Now many perish daily through falling into sin; whom the angels could help by visible appearance, or by miracles, or in some such-like way. The angels would therefore be negligent if men are given to their guardianship. But that is clearly false. Therefore the angels are not the guardians of men.

I answer that, According to the plan of Divine Providence, we find that in all things the movable and variable are moved and regulated by the immovable and invariable; as all corporeal things by immovable spiritual substances, and the inferior bodies by the superior which are invariable in substance. We ourselves also are regulated as regards conclusions, about which we may have various opinions, by the principles which we hold in an invariable manner. It is moreover manifest that as regards things to be done human knowledge and affection can vary and fail from good in many ways; and so it was necessary that angels should be deputed for the guardianship of men, in order to regulate them and move them to good.

Reply Obj. 1: By free-will man can avoid evil to a certain degree, but not in any sufficient degree; forasmuch as he is weak in affection towards good on account of the manifold passions of the soul. Likewise universal natural knowledge of the law, which by nature belongs to man, to a certain degree directs man to good, but not in a sufficient degree; because in the application of the universal principles of law to particular actions man happens to be deficient in many ways. Hence it is written (Wis. 9:14): "The thoughts of mortal men are fearful, and our counsels uncertain." Thus man needs to be guarded by the angels.

Reply Obj. 2: Two things are required for a good action; first, that the affection be inclined to good, which is effected in us by the habit of mortal virtue. Secondly, that reason should discover the proper methods to make perfect the good of virtue; this the Philosopher (Ethic. vi) attributes to prudence. As regards the first, God guards man immediately by infusing into him grace and virtues; as regards the second, God guards man as his universal instructor, Whose precepts reach man by the medium of the angels, as above stated (Q. 111, A. 1).

Reply Obj. 3: As men depart from the natural instinct of good by reason of a sinful passion, so also do they depart from the instigation of the good angels, which takes place invisibly when they enlighten man that he may do what is right. Hence that men perish is not to be imputed to the negligence of the angels but to the malice of men. That they sometimes appear to men visibly outside the ordinary course of nature comes from a special grace of God, as likewise that miracles occur outside the order of nature. _______________________

Obj. 2: Further, the lower things are brought to God through the medium of the higher, as Dionysius says (Coel. Hier. iv, xiii). But as all the angels are unequal (Q. 50, A. 4), there is only one angel between whom and men there is no medium. Therefore there is only one angel who immediately keeps men.

Obj. 3: Further, the greater angels are deputed to the greater offices. But it is not a greater office to keep one man more than another; since all men are naturally equal. Since therefore of all the angels one is greater than another, as Dionysius says (Coel. Hier. x), it seems that different men are not guarded by different angels.

I answer that, Each man has an angel guardian appointed to him. This rests upon the fact that the guardianship of angels belongs to the execution of Divine providence concerning men. But God's providence acts differently as regards men and as regards other corruptible creatures, for they are related differently to incorruptibility. For men are not only incorruptible in the common species, but also in the proper forms of each individual, which are the rational souls, which cannot be said of other incorruptible things. Now it is manifest that the providence of God is chiefly exercised towards what remains for ever; whereas as regards things which pass away, the providence of God acts so as to order their existence to the things which are perpetual. Thus the providence of God is related to each man as it is to every genus or species of things corruptible. But, according to Gregory (Hom. xxxiv in Evang.), the different orders are deputed to the different genera of things, for instance, the "Powers" to coerce the demons, the "Virtues" to work miracles in things corporeal; while it is probable that the different species are presided over by different angels of the same order. Hence it is also reasonable to suppose that different angels are appointed to the guardianship of different men.

Reply Obj. 1: A guardian may be assigned to a man for two reasons: first, inasmuch as a man is an individual, and thus to one man one guardian is due; and sometimes several are appointed to guard one. Secondly, inasmuch as a man is part of a community, and thus one man is appointed as guardian of a whole community; to whom it belongs to provide what concerns one man in his relation to the whole community, such as external works, which are sources of strength or weakness to others. But angel guardians are given to men also as regards invisible and occult things, concerning the salvation of each one in his own regard. Hence individual angels are appointed to guard individual men.

Reply Obj. 2: As above stated (Q. 112, A. 3, ad 4), all the angels of the first hierarchy are, as to some things, enlightened by God directly; but as to other things, only the superior are directly enlightened by God, and these reveal them to the inferior. And the same also applies to the inferior orders: for a lower angel is enlightened in some respects by one of the highest, and in other respects by the one immediately above him. Thus it is possible that some one angel enlightens a man immediately, and yet has other angels beneath him whom he enlightens.

Reply Obj. 3: Although men are equal in nature, still inequality exists among them, according as Divine Providence orders some to the greater, and others to the lesser things, according to Ecclus. 33:11, 12: "With much knowledge the Lord hath divided them, and diversified their ways: some of them hath He blessed and exalted, and some of them hath He cursed and brought low." Thus it is a greater office to guard one man than another. _______________________

Objection 1: It would seem that the guardianship of men does not belong only to the lowest order of the angels. For Chrysostom says that the text (Matt. 18:10), "Their angels in heaven," etc. is to be understood not of any angels but of the highest. Therefore the superior angels guard men.

Obj. 2: Further, the Apostle says that angels "are sent to minister for them who shall receive the inheritance of salvation" (Heb. 1:14); and thus it seems that the mission of the angels is directed to the guardianship of men. But five orders are sent in external ministry (Q. 112, A. 4). Therefore all the angels of the five orders are deputed to the guardianship of men.

Obj. 3: Further, for the guardianship of men it seems especially necessary to coerce the demons, which belongs most of all to the Powers, according to Gregory (Hom. xxxiv in Evang.); and to work miracles, which belongs to the Virtues. Therefore these orders are also deputed to the work of guardianship, and not only the lowest order.

I answer that, As above stated (A. 2), man is guarded in two ways; in one way by particular guardianship, according as to each man an angel is appointed to guard him; and such guardianship belongs to the lowest order of the angels, whose place it is, according to Gregory, to announce the "lesser things"; for it seems to be the least of the angelic offices to procure what concerns the salvation of only one man. The other kind of guardianship is universal, multiplied according to the different orders. For the more universal an agent is, the higher it is. Thus the guardianship of the human race belongs to the order of "Principalities," or perhaps to the "Archangels," whom we call the angel princes. Hence, Michael, whom we call an archangel, is also styled "one of the princes" (Dan. 10:13). Moreover all corporeal creatures are guarded by the "Virtues"; and likewise the demons by the "Powers," and the good spirits by the "Principalities," according to Gregory's opinion (Hom. xxxiv in Ev.).

Reply Obj. 1: Chrysostom can be taken to mean the highest in the lowest order of angels; for, as Dionysius says (Coel. Hier. x) in each order there are first, middle, and last. It is, however, probable that the greater angels are deputed to keep those chosen by God for the higher degree of glory.

Reply Obj. 3: Even inferior angels exercise the office of the superior, as they share in their gifts, and they are executors of the superiors' power; and in this way all the angels of the lowest order can coerce the demons, and work miracles. _______________________