Thomas Aquinas, on 1Cor 6:19

“Or know you not, that your members are the temple of the Holy Ghost, who is in you, whom you have from God; and you are not your own?”

“Then when he says, Do you not know, he presents the fourth reason, which is taken from the dignity of grace, which arises from two sources, namely, from the grace of the Holy Spirit and from the redemption of Christ's blood. In regard to this he does three things: first, he declares the dignity of our body, which it has from the grace of the Holy Spirit, saying: Do you not know, as though you should not be unaware of it, that your body, namely, bodily, is a temple of the Holy Spirit, just as he said above (3:16): "Do you not know that you are God's temple?" Then he assigns a reason for this, saying: who is within you. God's house is called a temple. Therefore, because the Holy Spirit is God, it is correct to say that anyone in whom the Holy Spirit exists is called a temple of God. But the Holy Spirit is chiefly in the heart of men, in whom the love of God is poured out by the Holy Spirit, as it says in Rom (5:5). But secondarily, He is also in the bodily members, inasmuch as they perform acts of charity. Hence it says in Ps 84 (v. 2): "My heart and my flesh sing for joy to the living God." But lest they ascribe this dignity to themselves, he adds: which you have from God and not from yourselves. Hence Jl (2:28): "I will pour out my Spirit on all flesh."”

Imported from an open dataset — not yet checked against the printed edition.