Joel 3:21

I will cleanse their blood, &c. The word blood seems here to signify pollution in general; and the promise implies, that God would perfectly purge away the guilt and defilement of all the sins of his people, by a free pardon and entire sanctification. Calmet, who applies this to the times of the gospel, thus interprets the verse: “Jesus Christ cleanses, by the new law, the blood which remained unclean under the old. We find in the sacrament of the new law that real purity, of which the legal ceremonies and purifications were only a figure.” For the Lord dwelleth in Zion

And his presence shall be a source of purity, as well as of consolation to his people. “It is uncertain,” says Archbishop Newcome, “whether we have the key to this difficult chapter; which may not be fully understood till Jerusalem is rebuilt, and till the prophecies, Ezekiel 39:5; Ezekiel 39:11; Revelation 20:8, are accomplished.”