Ps 121:7

“"Peace be in thy strength" (ver. 7). O Jerusalem, O city, who art being built as a city, whose partaking is in "The Same:" "Peace be in thy strength:" peace be in thy love; for thy strength is thy love. Hear the Song of songs: "Love is strong as death." A great saying that, brethren, "Love is strong as death." The strength of charity could not be expressed in grander terms than these, "Love is strong as death." For who resisteth death, my brethren? Consider, my brethren. Fire, waves, the sword, are resisted: we resist principalities, we resist kings; death cometh alone, who resisteth it? There is nought more powerful than it. Charity therefore is compared with its strength, in the words, "Love is strong as death." And since this love slayeth what we have been, that we may be what we were not; love createth a sort of death in us. This death he had died who said, "The world is crucified unto me, and I unto the world:" this death they had died unto whom he said, "Ye are dead, and your life is hid with Christ in God." Love is strong as death...”

“Let them therefore feel bitter grief for their detestable error of the past, as Peter did for his fear that led him into falsehood, and let them come to the true Church of Christ, that is, to the Catholic Church our mother; let them be in it clergy, let them be bishops unto its profit, as they have been hitherto in enmity against it. We feel no jealousy towards them, nay, we embrace them; we wish, we advise, we even compel those to come in whom we find in the highways and hedges, although we fail as yet in persuading some of them that we are seeking not their property, but themselves. The Apostle Peter, when he denied his Saviour, and wept, and did not cease to be an apostle, had not as yet received the Holy Spirit that was promised; but much more have these men not received Him, when, being severed from the framework of the body, which is alone enlivened by the Holy Spirit, they have usurped the sacraments of the Church outside the Church and in hostility to the Church, and have fought against us in a kind of civil war, with our own arms and our own standards raised in opposition to us. Let them come; let peace be concluded in the virtue of Jerusalem, which virtue is Christian charity,-to which holy city it is said, "Peace be in thy virtue, and plenteousness within thy palaces." Let them not exalt themselves against the solicitude of their mother, which she both has entertained and does entertain with the object of gathering within her bosom themselves, and all the mighty nations whom they are, or recently were, deceiving; let them not be puffed up with pride, that she receives them in such wise; let them not attribute to the evil of their own exaltation the good which she on her part does in order to make peace.”

“Strength. Fortifications, (Berthier) or army. — Towers, or “palaces.” (Hebrew) (Jeremias xxxi. 23.) (Calmet) — He insists so much on the blessing of peace, because he foresaw that Jerusalem would one day neglect it, Luke xix. 42. Charity dwells in the towers or saints, (Berthier) and makes us resemble God. (St. Chrysostom, de Laud. S. Paul. iii.)”