And expounded - Explained.
The way of God - Gave him full and ample instructions respecting the Messiah as having already come, and respecting the nature of his work.
Related Commentaries of Acts 18:26
Acts 18:26
26 And he began to speak boldly in the synagogue: whom when Aquila and Priscilla had heard, they took him unto them, and expounded unto him the way of God more perfectly.