18:5 And when Silas and Timotheus were come from Macedonia, Paul was pressed in the spirit, and testified to the Jews that Jesus was Christ.
18:7 And he departed thence, and entered into a certain man's house, named Justus, one that worshipped God, whose house joined hard to the synagogue.
Or, constrained by the Word. Cf. 2 Corinthians 5:14 .
18:17 Then all the Greeks took Sosthenes, the chief ruler of the synagogue, and beat him before the judgment seat. And Gallio cared for none of those things.
18:25 This man was instructed in the way of the Lord; and being fervent in the spirit, he spake and taught diligently the things of the Lord, knowing only the baptism of John.
18:28 For he mightily convinced the Jews, and that publickly, shewing by the scriptures that Jesus was Christ.
The N.T. Scriptures were not then written.
Apollos' ministry seems to have gone no further; Jesus was the long expected Messiah. Of Paul's doctrine of justification through the blood, and sanctification through the Spirit, he seems at that time to have known nothing. See Acts 19:3-6 .