Song of Solomon 6:3

So long as Christ wishes there to be one church of all nations, whoever is a stranger to the church is not considered a part of the body of Christ, even though he uses the name of Christian. That heresy which rejects the unity of the Catholic church is to him a concubine and not a wife, in that it loves Christ with an adulterous love, since Scripture says that there are actually two in one flesh, that is, Christ and the church, in which there is no third place for a harlot. "One is my friend, one is my bride, only daughter of her mother." Of whom, likewise, the same church speaks, saying, "My lover belongs to me, and I to him."

He is, indeed, your true bridegroom. He is also your brother. He is likewise your friend. He is your inheritance. He is your reward. He is God and the Lord. You have in him a bridegroom to love: "For he is fair in beauty above the sons of men." … He is a friend of whom you need not doubt, for he himself says, "You are my only lover." You have in him the inheritance that you may embrace, for he is himself the portion of your inheritance. You have in him the reward that you may recognize, for his blood is your redemption. You have in him God by whom you may be ruled, the Lord to fear and honor.

"I am my beloved's, and my beloved is mine," etc. I prepare a delightful pasture for my beloved in the beds of spices, that is, in the pure hearts of the faithful, and my beloved to me, who is fed among the holy desires of chaste minds, returns this in exchange for His grace by fulfilling the same desires of His faithful ones whom He has nurtured. He fulfills them by plucking them from this paradise of sacred pleasure and gathering them into the secret chambers of the heavenly mansions, where before His glory, with eternal immortality of flesh and spirit, they shine brightly with a dual aspect like lilies, that is, both golden and white, and as if spreading the sweet fragrance of their virtues throughout all the inhabitants of the eternal homeland. Thus far, the voice of the holy Church is heard, seeking and praising her Lord and desiring to see His face; but since He can never be absent from His lovers, but where two or three are gathered in His name, there He is in the midst of them, indeed even if one of His own is enclosed among lions, detained in the depths of the sea, or surrounded by the belly of a whale, if separated from other mortals, there He is with him. Therefore, His voice follows, declaring to those who search for Him and converse about Him that He was always present with them and heard what they spoke about, rewarding their devotion to Him with worthy praise, saying:

The Beloved descends into his garden to the bed of spices, because in visiting the Church, he comes with greater grace to those whom he knows to send forth from themselves to their neighbors the fragrance of good reputation through holy works and examples of virtues. He feeds in the gardens when he delights in the virtues of many souls. He gathers lilies when he cuts down each of the perfect from this life. But because the holy Church in her children is so joined to Christ by faith, sustained by hope, and bound together by charity, that she loves nothing apart from Christ, and holds him inseparably close to herself through faith and love, she therefore adds: "I am my Beloved's, and my Beloved is mine, who feeds among the lilies."

Moreover, the Bride has spoken more rightly, and not putting forward merit but setting forth the benefit first, and confessing that she has been preceded by the grace of the beloved. Rightly indeed. For "who has first given to him, and it shall be recompensed to him?" (Rom 11:35.) Finally, hear John, what he perceived in his Epistle on this matter. "In this is love," he says, "not as though we have loved God, but that he first loved us" (1 Jn 4:10). The Prophet, however, even if he was silent about the anticipation of grace, did not deny the following thereof: plainly he was not silent. But receive in another place his more certain confession concerning this matter. "And your mercy," he says (he was speaking to the Lord), "will follow me all the days of my life" (Ps 22:6). Hear also concerning the anticipation, his no less certain and manifest knowledge. "My God," he says, "his mercy will anticipate me" (Ps 58:11); likewise to the Lord: "Quickly," he says, "let your mercies anticipate us, for we have become exceedingly poor" (Ps 78:8). Beautifully the Bride later, if I am not mistaken, places these same words not in the same order, but she too follows the order of the Prophet, speaking in this manner: "I to my beloved, and my beloved to me." Why so? Surely so that she may then prove herself the more full of grace, when she shall have given all to grace, and ascribed to it, of course, both the first and the last parts. Otherwise, how full of grace, if she has anything that is not from grace? There is no place for grace to enter where merit has already occupied. Therefore the full confession of grace marks the fullness of grace itself in the soul of the one confessing. For if anything of one's own is present, to that extent grace must yield to it. Whatever you assign to merits is lacking to grace. I do not want the merit that excludes grace. I shudder at whatever is of my own, insofar as it makes me my own, except that perhaps that is more mine which makes me mine. Grace returns me to myself, justified freely, and so freed from the servitude of sin. For where the Spirit is, there is liberty.

She who is truly the Bride recognizes these things and confesses both graces: first indeed, that which is first, by which she was also anticipated; and afterward, the subsequent one as well. And so she says now: "My beloved to me, and I to him"; assigning the beginning to the beloved. In what follows: "I," she says, "to my beloved, and my beloved to me"; granting the consummation to him equally.