Obj. 2: Further, it is proper to religion to give worship to God. But piety also gives worship to God, according to Augustine (De Civ. Dei x). Therefore piety is not distinct from religion.
Obj. 3: Further, piety, whereby we give our country worship and duty, seems to be the same as legal justice, which looks to the common good. But legal justice is a general virtue, according to the Philosopher (Ethic. v, 1, 2). Therefore piety is not a special virtue.
On the contrary, It is accounted by Tully (De Invent. Rhet. ii) as a part of justice.
I answer that, A special virtue is one that regards an object under a special aspect. Since, then, the nature of justice consists in rendering another person his due, wherever there is a special aspect of something due to a person, there is a special virtue. Now a thing is indebted in a special way to that which is its connatural principle of being and government. And piety regards this principle, inasmuch as it pays duty and homage to our parents and country, and to those who are related thereto. Therefore piety is a special virtue.
Reply Obj. 1: Just as religion is a protestation of faith, hope and charity, whereby man is primarily directed to God, so again piety is a protestation of the charity we bear towards our parents and country.
Reply Obj. 2: God is the principle of our being and government in a far more excellent manner than one's father or country. Hence religion, which gives worship to God, is a distinct virtue from piety, which pays homage to our parents and country. But things relating to creatures are transferred to God as the summit of excellence and causality, as Dionysius says (Div. Nom. i): wherefore, by way of excellence, piety designates the worship of God, even as God, by way of excellence, is called "Our Father."
Reply Obj. 3: Piety extends to our country in so far as the latter is for us a principle of being: but legal justice regards the good of our country, considered as the common good: wherefore legal justice has more of the character of a general virtue than piety has. _______________________
FOURTH ARTICLE [II-II, Q. 101, Art. 4]
Whether the Duties of Piety Towards One's Parents Should Be Omitted for the Sake of Religion?
Objection 1: It seems that the duties of piety towards one's parents should be omitted for the sake of religion. For Our Lord said (Luke 14:26): "If any man come to Me, and hate not his father, and mother, and wife, and children, and brethren, and sisters, yea and his own life also, he cannot be My disciple." Hence it is said in praise of James and John (Matt. 4:22) that they left "their nets and father, and followed" Christ. Again it is said in praise of the Levites (Deut. 33:9): "Who hath said to his father, and to his mother: I do not know you; and to his brethren: I know you not; and their own children they have not known. These have kept Thy word." Now a man who knows not his parents and other kinsmen, or who even hates them, must needs omit the duties of piety. Therefore the duties of piety should be omitted for the sake of religion.