This man had been instructed — Though not perfectly, in the way of the Lord — In the doctrine of Christ. Knowing only the baptism of John — Only what John taught those whom he baptized, namely, to repent and believe in a Messiah shortly to appear.
Related Commentaries of Acts 18:25
Acts 18:25
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.