Please clarify what you are defining transubstantiation or omnipresence?
Well, Gab, the word
omnipresence means everywhere present (not to be confused with
pantheism). Now here’s what your catechism states:"The sacrifice of Christ and the sacrifice of the Eucharist are one single sacrifice: “
The victim is one and the same: the same now offers through the ministry of priests, who then offered himself on the cross; only the manner of offering is different.” “And since in this divine sacrifice which is celebrated in the Mass,
the same Christ who offered himself once in a bloody manner on the altar of the cross is contained and is offered in an unbloody manner…this sacrifice is truly propitiatory.”
1376 "The Council of Trent summarizes the Catholic faith by declaring: "Because Christ our Redeemer said that it was truly his body that he was offering under the species of bread, it has always been the conviction of the Church of God, and this holy Council now declares again, that by the consecration of the bread and wine there takes place of the whole substance of the bread into the substance of the body of Christ our Lord and of the whole substance of the wine into the substance of his blood. This change the Holy Catholic Church has fittingly and properly called
transubstantiation.IOW, the bread and wine become the ACTUAL (substance) body and blood of Christ. Of course Jesus never mentioned “soul” and “divinity,” but RC’ism threw those in as well.
and why “the divine attribute of omnipresence cannot be applied to the humanity of Christ?”
Well, it’s actually explained right there in your question in two words: “
divine” and “
humanity.” These are two distinct substances. Christ was both fully human and fully divine, but He was not a mixture of both. Christ had/has a true body. By true body is meant a
material body composed of flesh and blood, and in everything essential like the bodies of ordinary men. It wasn’t a phantasm, nor was it fashioned out of any heavenly or ethereal substance. He was “
born of a woman.” His body increased in stature and developed from infancy to manhood. It was subject to pain, pleasure, hunger, thirst, fatigue, suffering and death. It could bee seen, felt and handled. It was, as the Scriptures reveal, true flesh and blood as ours (Heb. 2:14).
All of Christianity accepts the doctrine of the
hypostatic union. That is, in the
Person of Jesus are united both humanity and divinity. That He has in His constitution the same essence, or substance, which constitutes us men (true humanity), and the same substance which makes God infinite, eternal and immutable in all His perfections (true divinity). But this union in the Person of Christ is not by mixture, that is, the blending of the two “substances,” or, “natures,” thereby producing a third, or, new substance which is neither truly human nor truly divine, but possessing properties of both. Which is an impossibility because the two properties (substances, natures) are totally incompatible. Just as you cannot mingle mind and matter so as to make a substance which is neither mind nor matter, but “
spiritual matter,” for that would be a contradiction. Like unextended extension; tangible intangibility, or visible invisibility.
Is the
Person of Jesus Christ theanthopic, yes! But not his nature. He is both
fully human and
fully divine, but His humanity did not become divinity and His divinity did not become human. In His
Person the two natures remain pure and distinct. In Him the finite did not become infinite and the infinite did not become finite.
For this reason you cannot assign a divine attribute like
omnipresence to the human body and blood of Christ. They’re
material. Jesus, in His humanity can be in only one place at one time. Even in His now glorified body. Even that’s fully human - not divine. That’s why we must wait for His
bodily return to this earth. Bodily He can only be in one place at a time. That rule of course does not apply to His divine nature because divinity is
omnipresent, and it is not material.
The doctrine of
transubstantiation demands the impossible: Tthat the body of Jesus be
omnipresent. Something totally incompatible to its very nature. After all, there’s Mass being celebrated wherever there’s a Catholic church and according to the doctrine, hosts are being transformed into the
actual body and blood (spirit & divinity) of Jesus millions of times a day. Not the body in which He ascended into heaven (glorified), but the body of His humiliation (crucified, pre-resurrection). Hence, the doctrine demands (1) that the crucified body and shed blood of Jesus be in many, many places at one time and (2) Jesus must
simultaneously be in two kinds of bodies at one time (crucified & glorified - dead & alive - destructible & indestructible - subject to death & eternal).
So it begs the question, how can all this be?
One proposed solution is that God is
cloning Jesus millions of times a day. But then it would not be Jesus but millions of copies of Him.
The most reasonable solution is that you simply have a wrong interpretation of His words in Jn. 6 and in the upper room when He instituted Communion.