Catholic Cardinal Joseph Ratzinger made this confession about the origin of the chief Trinity text of Matthew 28:19. "The basic form of our (Matthew 28:19 Trinitarian) profession of faith took shape during the course of the second and third centuries in connection with the ceremony of baptism. So far as its place of origin is concerned, the text (Matthew 28:19) came from the city of Rome."
That is absolute rubbish. That is just copy/pasted from some vitriolic anti-trinitarian website. This piece of lying poison is floating all over the internet. A person who would quote something like this without verifying it should be ashamed of themself. Here is what then Cardinal Ratzinger actually said. Link to the book below where this can be verified.
Introduction to Christianity, By Pope Benedict XVI, Chapter 2 The Ecclesiastical Form of Faith
The answers can only be found by looking at the concrete shape of Christian belief, and this we now mean to consider, using
the so-called Apostles Creed as a guiding thread. It may be useful to preface the discussion with a few facts about
the origin and structure of the Creed; these will at the same time throw some light on the legitimacy of the procedure. The basic form of our profession of faith [the Creed] took shape during the course of the second and third centuries in connection with the ceremony of baptism. So far as its place of origin is concerned, the text comes from the city of Rome; but its internal origin lies in worship; more precisely, in the conferring of baptism.
This again was fundamentally based on the words of the risen Christ recorded in Matthew 28:19: "Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit."
Introduction to Christianity - Pope Benedict XVI - Google Books
Early church fathers who quoted Matt 28:19 with the Triadic formula long before the RCC existed, ca. 1075 AD. FYI I am not RCC, just a believer in truth.
Ignatius, ca 110
For those things which the prophets announced, saying, Until He come for whom it is reserved, and He shall be the expectation of the Gentiles, have been fulfilled in the Gospel, [our Lord saying,] Go ye and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost. (Ignatius of Antioch, Epistle to the Philadelphians, 9.2)
Irenaeus, ca 170
And again, giving to the disciples the power of regeneration into God, He said to them, Go and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost. (Irenaeus, Against Heresies, Book III, chap 17.1)
Tertullian, ca 200
Accordingly, after one of these had been struck off, He commanded the eleven others, on His departure to the Father, to go and teach all nations, who were to be baptized into the Father, and into the Son, and into the Holy Ghost. (Tertullian, Prescription Against the Heretics, 20)