Cyprian of Carthage
Christ, teaching and showing that the Gentile people enters the place which the Jews lost, while we later acquire it by the merit of faith, changed water into wine.
That is, He indicates that the peoples should be more fully mingled and come to the wedding of Christ and the Church at the time when the Jews are absent.
For divine Scripture explains in the Apocalypse that water signifies peoples, saying: "The waters which you saw, where the harlot sits, are peoples and multitudes and nations and tongues."
We clearly understand that this very thing is contained in the Mystery of Communion. Since Christ bore us all, and also bore our sins, we see that the peoples are understood by the water, while the Blood of Christ is certainly signified by the wine.
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When water is mixed with wine in the chalice, the peoples are united with Christ. The believing people is joined and coupled with Him in whom it has believed.
This union and bond of water and wine is so mingled in the Lord's cup that this mixture cannot be separated from itself. Therefore nothing can separate the Church from Christ.
The Church means the people who are in the Church and who faithfully and steadfastly persevere in what they have believed. Thus undivided love is always kept and remains.
As only water cannot be offered in the consecration of the Lord's cup, so neither can only wine be offered. If someone offers wine alone, the Blood of Christ remains without us.
If he offers water alone, the peoples remain without Christ. But when both are mixed and bound to each other in inseparable unity, then the spiritual and heavenly Mystery is fulfilled.