But if the literal Catholic teaching is applied does not this answer negate Jesus’ own words as we previously discussed?
I think some distinctions need to be made. Jesus, at the time of the Bread of Life discourse, was answering the Jew’s challenge. They were telling Him that Moses gave them Manna in the wilderness. Then they asked what He would give. He told them God gave them Manna, and He would give them His body and blood.
Now where you and I can agree, I think, is that He doesn’t separate His Teachings from receiving His body and blood. So receiving His body and blood is also receiving His Teachings. But they are not necessarily one and the same thing. His body and blood is His real flesh and blood, while His Teachings are His Word.
When John, in the beginning of his Gospel says “…the Word became flesh” he was making this profound connection.
So when a professing Christian makes a decision to believe, they must follow the command to partake of the Lord’s Supper. When they do this, they are submitting to the leadership which gives them Communion. They also give them a body of doctrine which they say is from Jesus.
It gets complicated with Christians divided from His one Eucharist, because that also means they are divided from His one Teaching. But the Catechism addresses this principle here:
818*"However, one cannot charge with the sin of the separation those who at present are born into these communities [that resulted from such separation] and in them are brought up in the faith of Christ, and the Catholic Church accepts them with respect and affection as brothers . .
.. All who have been justified by faith in Baptism are incorporated into Christ; they therefore have a right to be called Christians, and with good reason are accepted as brothers in the Lord by the children of the Catholic Church."272
819*"Furthermore, many elements of sanctification and of truth"273are found outside the visible confines of the Catholic Church: "the written Word of God; the life of grace; faith, hope, and charity, with the other interior gifts of the Holy Spirit, as well as visible elements."274*Christ’s Spirit uses these Churches and ecclesial communities as means of salvation, whose power derives from the fullness of grace and truth that Christ has entrusted to the Catholic Church. All these blessings come from Christ and lead to him,275and are in themselves calls to "Catholic unity."276
838*"The Church knows that she is joined in many ways to the baptized who are honored by the name of Christian, but do not profess the Catholic faith in its entirety or have not preserved unity or communion under the successor of Peter."322
Those "who believe in Christ and have been properly baptized are put in a certain, although imperfect, communion with the Catholic Church."323With the Orthodox Churches, this communion is so profound "that it lacks little to attain the fullness that would permit a common celebration of the Lord’s Eucharist."324