Now we can realize finally the sense of the "Baptism of John" worked by Apollos in Acts 18:23-25:
After spending some time in Antioch, Paul set out from there and traveled from place to place throughout the region of Galatia and Phrygia, strengthening all the disciples.
24 Meanwhile a Jew named Apollos, a native of Alexandria, came to Ephesus. He was a learned man, with a thorough knowledge of the Scriptures. 25 He had been instructed in the way of the Lord, and he spoke with great fervor and taught about Jesus accurately, though he knew only the baptism of John.
here the author shows surprise for the fact that Apollos knows only the baptism of John. In virtue of this surprise, he is an idiot, because Acts 19:4 gives a perfect explanation:
Paul said, “John’s baptism was a baptism of repentance. He told the people to believe in the one coming after him, that is, in Jesus.”
This passage is a perfect explanation of the Apollonism since it proves that there was not need of two baptisms, one in the name of John and another in the name of Jesus, since the former and the latter coincided. In other terms, according to the logic of Acts 19:4, Apollos knew
already the baptism in the name of
Jesus, differently from what the author of Acts thinks about it.