Got it. Anything in the Holy Bible to back all that up? I mean, to be convincing to a non-RC, wouldn't it be good to hear such an important part of theology from the lips of the Lord Jesus Christ Himself?
Sure.
The doctrine of the communion of saints was taught by the apostles, both in the Scriptures and the Tradition they handed down in words and practice. It is explicitly contained in the Apostles’ Creed. The Church reaffirmed this teaching at the Second Council of Nicea (787) and further addressed it at the Councils of Florence (1438–45), Trent (1545–63), and Vatican II (1962–65).
This communion refers to the bond of unity among the followers of Christ. Such a bond is possible because, as believers in Christ, we become children of God (1 Jn. 3:1), members of His family (Rom. 8:14–17), with divine life bestowed on us through Baptism (Jn. 3:3–5). The apostles teach us that through Baptism we become “fellow heirs with Christ” (Rom. 8:17) and “partakers of the divine nature” (2 Pet. 1:4). Saint Paul states that this union of the faithful, brought about by the Holy Spirit in Baptism, is so complete that we are actually members of a single body, Christ’s own body (cf. 1 Cor. 12:12–27).
The communion of saints is based on four essential points:
All Christians are members of Christ’s body and one another (Rom. 12:5; 1 Cor. 12:27).
Jesus has only one body (Eph. 4:4; Col. 3:15).
Death cannot separate Christians from Christ or from one another (Rom. 8:35–39; cf. Lk. 20:37–38).
Christians are bound in mutual love (Jn. 13:34–35; Rom. 12:10).
Suprenant, L. J., Jr., & Gray, P. C. L. (1999). Faith Facts: Answers to Catholic Questions (Vol. 1, pp. 33–34). Steubenville, OH: Emmaus Road Publishing.
Why? seriously we quote scripture to you all the time and you claim literal words are figurative or metaphor.
Mat_26:26 And as they were eating, Jesus took bread, and blessed, and brake it; and he gave to the disciples, and said, Take, eat; this is my body.
Mar_14:22 And as they were eating, he took bread, and when he had blessed, he brake it, and gave to them, and said, Take ye: this is my body.
Luk_22:19 And he took bread, and when he had given thanks, he brake it, and gave to them, saying, This is my body which is given for you: this do in remembrance of me.
1Co_11:24 and when he had given thanks, he brake it, and said, This is my body, which is for you: this do in remembrance of me.
Joh_6:51 I am the living bread which came down out of heaven: if any man eat of this bread, he shall live for ever: yea and the bread which I will give is my flesh, for the life of the world.
Joh_6:53 Jesus therefore said unto them, Verily, verily, I say unto you, Except ye eat the flesh of the Son of man and drink his blood, ye have not life in yourselves.
There you have Jesus own words and Paul reiterating them.
a couple of things come to mind, how about "I will give you the keys to the kingdom of Heaven"...or what you bind on Earth will be bound in Heaven and whet you shall loose...etc.