Whether religion is a virtue?
Objection 1: It would seem that religion is not a virtue. Seemingly it belongs to religion to pay reverence to God. But reverence is an act of fear which is a gift, as stated above (Q[19], A[9]). Therefore religion is not a virtue but a gift
Objection 2: Further, every virtue is a free exercise of the will, wherefore it is described as an "elective" or voluntary "habit" [*Ethic. ii, 6]. Now, as stated above (A[1], ad 3) "latria" belongs to religion, and "latria" denotes a kind of servitude. Therefore religion is not a virtue.
Objection 3: Further, according to Ethic. ii, 1, aptitude for virtue is in us by nature, wherefore things pertaining to virtue belong to the dictate of natural reason. Now, it belongs to religion "to offer ceremonial worship to the Godhead" [*Cf. A[1]], and ceremonial matters, as stated above (FS, Q[99], A[3], ad 2; FS, Q[101]), do not belong to the dictate of natural reason. Therefore religion is not a virtue.
On the contrary, It is enumerated with the other virtues, as appears from what has been said above (Q[80]).
I answer that, As stated above (Q[58], A[3]; FS, Q[55], AA[3],4) "a virtue is that which makes its possessor good, and his act good likewise," wherefore we must needs say that every good act belongs to a virtue. Now it is evident that to render anyone his due has the aspect of good, since by rendering a person his due, one becomes suitably proportioned to him, through being ordered to him in a becoming manner. But order comes under the aspect of good, just as mode and species, according to Augustine (De Nat. Boni iii). Since then it belongs to religion to pay due honor to someone, namely, to God, it is evident that religion is a virtue.
Reply to Objection 1: To pay reverence to God is an act of the gift of fear. Now it belongs to religion to do certain things through reverence for God. Hence it follows, not that religion is the same as the gift of fear, but that it is referred thereto as to something more excellent; for the gifts are more excellent than the moral virtues, as stated above (Q[9], A[1], ad 3; FS, Q[68], A[8]).
Reply to Objection 2: Even a slave can voluntarily do his duty by his master, and so "he makes a virtue of necessity" [*Jerome, Ep. liv, ad Furiam.], by doing his duty voluntarily. In like manner, to render due service to God may be an act of virtue, in so far as man does so voluntarily.
Reply to Objection 3: It belongs to the dictate of natural reason that man should do something through reverence for God. But that he should do this or that determinate thing does not belong to the dictate of natural reason, but is established by Divine or human law.
Whether religion is one virtue?
Objection 1: It would seem that religion is not one virtue. Religion directs us to God, as stated above (A[1]). Now in God there are three Persons; and also many attributes, which differ at least logically from one another. Now a logical difference in the object suffices for a difference of virtue, as stated above (Q[50], A[2], ad 2). Therefore religion is not one virtue.
Objection 2: Further, of one virtue there is seemingly one act, since habits are distinguished by their acts. Now there are many acts of religion, for instance to worship, to serve, to vow, to pray, to sacrifice and many such like. Therefore religion is not one virtue.
Objection 3: Further, adoration belongs to religion. Now adoration is paid to images under one aspect, and under another aspect to God Himself. Since, then, a difference of aspect distinguishes virtues, it would seem that religion is not one virtue.
On the contrary, It is written ( Eph. 4:5 ): "One God [Vulg.: 'Lord'], one faith." Now true religion professes faith in one God. Therefore religion is one virtue.
I answer that, As stated above (FS, Q[54], A[2], ad 1), habits are differentiated according to a different aspect of the object. Now it belongs to religion to show reverence to one God under one aspect, namely, as the first principle of the creation and government of things. Wherefore He Himself says ( Malach. 1:6 ): "If . . . I be a father, where is My honor?" For it belongs to a father to beget and to govern. Therefore it is evident that religion is one virtue.
Reply to Objection 1: The three Divine Persons are the one principle of the creation and government of things, wherefore they are served by one religion. The different aspects of the attributes concur under the aspect of first principle, because God produces all things, and governs them by the wisdom, will and power of His goodness. Wherefore religion is one virtue.
Reply to Objection 2: By the one same act man both serves and worships God, for worship regards the excellence of God, to Whom reverence is due: while service regards the subjection of man who, by his condition, is under an obligation of showing reverence to God. To these two belong all acts ascribed to religion, because, by them all, man bears witness to the Divine excellence and to his own subjection to God, either by offering something to God, or by assuming something Divine.
Reply to Objection 3: The worship of religion is paid to images, not as considered in themselves, nor as things, but as images leading us to God incarnate. Now movement to an image as image does not stop at the image, but goes on to the thing it represents. Hence neither "latria" nor the virtue of religion is differentiated by the fact that religious worship is paid to the images of Christ.
Whether religion is a special virtue, distinct from the others?
Objection 1: It would seem that religion is not a special virtue distinct from the others. Augustine says (De Civ. Dei x, 6): "Any action whereby we are united to God in holy fellowship, is a true sacrifice." But sacrifice belongs to religion. Therefore every virtuous deed belongs to religion; and consequently religion is not a special virtue.
Objection 2: Further, the Apostle says ( 1 Cor. 10:31 ): "Do all to the glory of God." Now it belongs to religion to do anything in reverence of God, as stated above (A[1], ad 2; A[2]). Therefore religion is not a special virtue.
Objection 3: Further, the charity whereby we love God is not distinct from the charity whereby we love our neighbor. But according to Ethic. viii, 8 "to be honored is almost to be loved." Therefore the religion whereby we honor God is not a special virtue distinct from observance, or "dulia," or piety whereby we honor our neighbor. Therefore religion is not a special virtue.
On the contrary, It is reckoned a part of justice, distinct from the other parts.
I answer that, Since virtue is directed to the good, wherever there is a special aspect of good, there must be a special virtue. Now the good to which religion is directed, is to give due honor to God. Again, honor is due to someone under the aspect of excellence: and to God a singular excellence is competent, since He infinitely surpasses all things and exceeds them in every way. Wherefore to Him is special honor due: even as in human affairs we see that different honor is due to different personal excellences, one kind of honor to a father, another to the king, and so on. Hence it is evident that religion is a special virtue.
Reply to Objection 1: Every virtuous deed is said to be a sacrifice, in so far as it is done out of reverence of God. Hence this does not prove that religion is a general virtue, but that it commands all other virtues, as stated above (A[1], ad 1).