13 What shall I say, then, brethren? Even the heretics have virgins, and there are many virgins among heretics. Let us see whether they love the Bridegroom, so that this virginity may be guarded. For whom is it guarded? “For Christ.” Let us see if it be for Christ, and not for Donatus: let us see for whom this virginity is preserved: you can easily prove. Behold, I show you the Bridegroom, for He shows Himself. John bears witness to Him: “This is He that baptizes.” O you virgin, if for this Bridegroom you preserve your virginity, why do you run to him who says, “I am he that baptizes,” while the friend of the Bridegroom tells you, “This is He that baptizes”?
Again, your Bridegroom possesses the whole world; why, then, should you be defiled with a part of it? Who is the Bridegroom? “For God is King of all the earth.” This your Bridegroom possesses the whole, because He purchased the whole. See at what price He purchased it, that you may understand what He has purchased. What price has He given? He gave His blood. Where gave He, where shed He, His blood? In His passion. Is it not to your Bridegroom you sing, or feignest to sing, when the whole world was purchased: “They pierced my hands and my feet, they counted all my bones: but they themselves considered me, they looked upon me, they divided my garments among them, and upon my vesture they cast lots”?
You are the bride, acknowledge your Bridegroom's vesture. Upon what vesture was the lot cast? Ask the Gospel; see to whom you are espoused, see from whom you receive pledges. Ask the Gospel; see what it tells you in the suffering of the Lord. “There was a coat” there: let us see what kind; “woven from the top throughout.” What does the coat woven from the top signify, but charity? What does this coat signify, but unity? Consider this coat, which not even the persecutors of Christ divided. For it says, “They said among themselves, Let us not divide it, but let us cast lots upon it.” Behold that of which the psalm spoke! Christ's persecutors did not rend His garment; Christians divide the Church.
Source: Tractates on the Gospel of John (New Advent)