But if that happens, aren't they going to prove where 'that' doctrine started in the RC church?
I have found in my studies that historic writings of the Early Church Fathers does show it.(as I will show later in this post) Not only in the Latin/Roman Rite, but in all of the other Rites within the Catholic Church.
I mean, his whole OP was proof the Born again experience wasn't taught by anyone until recent centuries....right?
Yes, in the Evangelical formula teaching of being "born again" as I listed 1-6 on my OP, that would be correct.
So when did the RC start teaching it happens as water baptism?
As a former cradle Catholic, I am surprised you don't know this. Anyway, as far as the teachings of the Catholic Church from Sacred Scripture, we look at the following passages:
"Born Again in Water Baptism:
John 1:32 – when Jesus was baptized, He was baptized in the water and the Spirit, which descended upon Him in the form of a dove. The Holy Spirit and water are required for baptism. Also, Jesus’ baptism was not the Christian baptism He later instituted. Jesus’ baptism was instead a royal anointing of the Son of David (Jesus) conferred by a Levite (John the Baptist) to reveal Christ to Israel, as it was foreshadowed in 1 Kings 1:39 when the Son of David (Solomon) was anointed by the Levitical priest Zadok. See John 1:31; cf. Matt. 3:16; Mark 1:9; Luke 3:21.
John 3:3,5 – Jesus says, “Truly, truly, unless one is born of water and the Spirit, he cannot enter the kingdom of God.” When Jesus said “water and the Spirit,” He was referring to baptism (which requires the use of water, and the work of the Spirit).
John 3:22 – after teaching on baptism, John says Jesus and the disciples did what? They went into Judea where the disciples baptized. Jesus’ teaching about being reborn by water and the Spirit is in the context of baptism.
John 4:1 – here is another reference to baptism which naturally flows from Jesus’ baptismal teaching in John 3:3-5.
Acts 8:36 – the eunuch recognizes the necessity of water for his baptism. Water and baptism are never separated in the Scriptures.
Acts 10:47 – Peter says “can anyone forbid water for baptizing these people..?” The Bible always links water and baptism.
Acts 22:16 – Ananias tells Saul, “arise and be baptized, and wash away your sins.” The “washing away” refers to water baptism.
Titus 3:5-6 – Paul writes about the “washing of regeneration,” which is “poured out on us” in reference to water baptism. “Washing” (loutron) generally refers to a ritual washing with water.
Heb. 10:22 – the author is also writing about water baptism in this verse. “Having our hearts sprinkled from an evil conscience and our bodies washed with pure water.” Our bodies are washed with pure water in water baptism.
2 Kings 5:14 – Naaman dipped himself seven times in the Jordan, and his flesh was restored like that of a child. This foreshadows the regenerative function of baptism, by water and the Holy Spirit.
Isaiah 44:3 – the Lord pours out His water and His Spirit. Water and the Spirit are linked to baptism. The Bible never separates them.
Ezek. 36:25-27 – the Lord promises He will sprinkle us with water to cleanse us from sin and give us a new heart and spirit. Paul refers to this verse in Heb. 10:22. The teaching of Ezekiel foreshadows the salvific nature of Christian baptism instituted by Jesus and taught in John 3:5, Titus 3:5, 1 Peter 3:21 and Acts 22:16."
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And from Sacred Tradition /Early Church Fathers. (ECF) (please pay close attention to the dates of these writings, its very important)
"1. “Born Again” Means Water Baptism:
For Christ also said, ‘Except ye be born again, ye shall not enter into the kingdom of heaven.’ Now, that it is impossible for those who have once been born to enter into their mothers’ wombs, is manifest to all. And how those who have sinned and repent shall escape their sins, is declared by Esaias the prophet, as I wrote above; he thus speaks: ‘Wash you, make you clean; put away the evil of your doings from your souls; learn to do well…And though your sins be as scarlet, I will make them white like wool; and though they be as crimson, I will make them white as snow…And for this [rite] we have learned from the apostles this reason. Since at our birth we were born without our own knowledge or choice, by our parents coming together, and were brought up in bad habits and wicked training; in order that we may not remain the children of necessity and of ignorance, but may become the children of choice and knowledge, and may obtain in the water the remission of sins formerly committed, there is pronounced over him who chooses to be born again, and has repented of his sins, the name of God the Father and Lord of the universe; he who leads to the layer the person that is to be washed calling him by this name alone…And this washing is called illumination, because they who learn these things are illuminated in their understandings. And in the name of Jesus Christ, who was crucified under Pontius Pilate, and in the name of the Holy Ghost, who through the prophets foretold all things about Jesus, he who is illuminated is washed.” Justin Martyr, First Apology, 61 (A.D. 110-165).
“Moreover, the things proceeding from the waters were blessed by God, that this also might be a sign of men’s being destined to receive repentance and remission of sins, through the water and laver of regeneration,–as many as come to the truth, and are born again, and receive blessing from God.” Theopilus of Antioch, To Autolycus, 2:16 (A.D. 181).
” ‘And dipped himself,’ says [the Scripture], ‘seven times in Jordan.’ It was not for nothing that Naaman of old, when suffering from leprosy, was purified upon his being baptized, but it served as an indication to us. For as we are lepers in sin, we are made clean, by means of the sacred water and the invocation of the Lord, from our old transgressions; being spiritually regenerated as new-born babes, even as the Lord has declared: ‘Except a man be born again through water and the Spirit, he shall not enter into the kingdom of heaven.'” Irenaeus, Fragment, 34 (A.D. 190).
“When, however, the prescript is laid down that ‘without baptism, salvation is attainable by none” (chiefly on the ground of that declaration of the Lord, who says, “Unless one be born of water, he hath not life.'” Tertullian, On Baptism, 12:1 (A.D. 203).
“But give me now your best attention, I pray you, for I wish to go back to the fountain of life, and to view the fountain that gushes with healing. The Father of immortality sent the immortal Son and Word into the world, who came to man in order to wash him with water and the Spirit; and He, begetting us again to incorruption of soul and body, breathed into us the breath (spirit) of life, and endued us with an incorruptible panoply. If, therefore, man has become immortal, he will also be God. And if he is made God by water and the Holy Spirit after the regeneration of the layer he is found to be also joint-heir with Christ after the resurrection from the dead. Wherefore I preach to this effect: Come, all ye kindreds of the nations, to the immortality of the baptism.” Hippolytus of Rome, Discourse on the Holy Theophany, 8 (A.D. 217). (source--Scripturecatholic.com)
I could give many more examples of the ECF's, but I think this should suffice.
Or does the church really even do so?
Again, as a former cradle Catholic, and with all respect, I am surprised you asked this.
Like I said, I'm watching with true interest.
Hope this post helps.
Also, if you don't mind, could I ask why you left the Catholic Church? If it is to personal of a question, I understand.
Have a Blessed Day
p.s. sorry for the long post.