The Body and the Blood of Christ together with His Soul and His Divinity and therefore the Whole Christ are truly present in the Eucharist [De Fide]
The body of Christ is present under the form of bread and the blood of Christ under the form of the wine ex vi verborum, that is, by the power of the words of consecration. Per concomitantiam [by concomitance], that is on account of the real connection between the body and the blood of Christ, His blood and His soul are also present with the body of Christ under the form of bread, as He is a living body. [Roman 6:9] [Concomitantia naturalis], and on the ground of the Hypostatic Union His Divinity is also present [concomitantia supernaturalis.] Similarly, under the form of win besides His blood Christ’s body and soul and Divnity are also present by concomitance.
In the Eucharistic promissory speech we find the words: “He that eateth my flesh and drinketh my blood” [John 6:54-56] parallel to the words: “He that eateth me” [vs. 57], that is, the Whole Person of Christ . Therefore the whole Christ is present with the flesh and blood of Christ. [1st Cor. 11:27]
The Whole Christ is present under each of the two Species. [De Fide]
In the dogam of the totality of the Real Presence it is implicitly stated that the Whole Chist is present under EACH OF THE TWO SPECIES INDIVIDUALLY. The Council of Constance raised this proposition to a dogma, in opposition to the Hussites, who demanded Communio under both forms.
This dogma is the legal basis of the usage of communion under one form. It is true that up to the 13th century Communion under the double form was the regular one, but Communion under one form was known even in antiquity, in the Communion of children, in Communion received at home, in Communion of the sick.
This preceeding was taken from the book Fundamentals of Catholic Dogma by Dr. Ludwig Ott.
The next is taken from a Tour of the Summa by Msgr. Paul J. Glenn
- In the Holy Eucharist, Christ is present whole and entire [Body, Blood, soul, and Godhead or divnity] under the appearances or accidentals of bread and wine. The words of Consecration bring the living Christ, God and man, truly present. The words, “This is My Body,” bring Christ’s Body truly present, and the Godhead which assumed this body. The words, “This is myh Blood,” bring Christ’s Blood truly present. THIS IS CHRIST’S LIVING BLOOD; therefore IT IS IN ITS BODY, WITH THE SOUL, AND THE DIVINITY OR GODHEAD WHICH ASSUMED THIS BLOOD. THUS THE WHOLE CHRIST IS PRESENT UNDER THE APPEAREANCES OF BREAD, AND THE WHOLE CHRIST IS PRESENT UNDER THE APPEARANCES OF WINE, AND THE WHOLE CHRIST IS PRESENT UNDER BOTH APPEARANCES TOGETHER. For, if two things are really united, wherever one is the other must be. Thus, by the words, “this is my Body”, and be the necessity of concomitance, the Blood of Christ is present also, as is the soul, and the divinity. And the Blood of CHrist is present at the words, “This is My Blood,” and, by the necessity of concomitance, the Body of Christ is present also, as is the soul, and the divinity.
- Therefore, the whole Christ, God and man, is contained under each species - that is, each set of appearances, namely, the appearances of bread and the appearances of wine.
