On pages 24 and 25 of his book, Baptist Successionism: A Crucial Question in Baptist History, Dr. James E. McGoldrick demonstrates that on the subject of revelation, and the teaching that would, during the Reformation, become known as Sola Scriptura, St. Patrick was not a Baptist:
Although details are lacking, Patrick’s time in slavery seems to have been the occasion for a growing devotion to God and the development of a powerful desire to evangelize the pagan Irish. The conviction that he should embrace the life of a missionary came, Patrick believed, in the form of a vision which included a voice from heaven.
I saw one night a vision, a man coming as it were from Ireland (his name was Victoricus), with countless letters, and I read the heading of the letter, “The Voice of the Irish,” and as I read . . . at that moment I heard voices of those who dwelt beside the wood of the Focluth, which is by the western sea; and thus they cried, as if with one mouth: “We beseech thee, holy youth, to come and work once more among us.” [See St. Patrick: His Writings and Muirchu’s Life, ed. And tr. A. B. E. Hood (Totowa, NJ: Rowman & Littlefield, 1978), 45-46].
This account of his call to the ministry reflects Patrick’s belief in continuing and direct revelations from God apart from scripture. He reported many such experiences and claimed that some of his converts received such revelations as well [Ibid., 50] [Baptist Successionism: A Crucial Question in Baptist History, James Edward McGoldrick (Scarecrow Press, 2000)].
In these three paragraphs, Dr. McGoldrick demonstrates that for St. Patrick to attribute to a supernatural vision his call to return to Ireland as a missionary, and to claim “many such experiences” in his writings, he sets himself at variance with the historic Baptist view of Sola Scriptura it had originally received from the magisterial reformation.
Although in the present day, there are a myriad of emphases among a broad range of movements and denominations which claim the name “Baptist,” including charismatic emphases that would claim unity with St. Patrick on supernatural revelations given directly by the Holy Spirit apart from the written Word of God, this is not the view of the historic Baptist tradition. The teaching of the Calvinistic wing of the historic Baptist tradition is contained in the 1689 Baptist Confession of Faith, which reads in its chapter, “Of the Holy Scriptures”:
Therefore it pleased the Lord at different times, and in various manners to reveal Himself, and to declare that His will unto His church (Heb 1:1); and afterward for the better preserving and propagating of the truth, and for the more sure establishment and comfort of the church against the corruption of the flesh, and the malice of Satan, and of the world, to commit the same wholly unto writing; which makes the Holy Scriptures to be most necessary, those former ways of God’s revealing His will unto His people being now ceased (Pr 22:19-21; Rom 15:4; 2 Pet 1:19,20) (emphasis mine).
These sentences from the Baptist Confession affirm that while God’s revelation of himself used to come in various supernatural manifestations like visions, among others, the Baptist tradition believes that Holy Scripture alone is the source of God’s revelation of himself to his church, precluding, since the completion of the canon, “continuing and direct revelations from God apart from scripture” of the sort St. Patrick claimed for himself and his followers. This is just one way in which St. Patrick was not a Baptist.