Acts 18:28

This man had been instructed in the way of the Lord; and being fervent in spirit, he spoke and taught accurately the things concerning Jesus, although he knew only the baptism of John.

He began to speak boldly in the synagogue. But when Priscilla and Aquila heard him, they took him aside, and explained to him the way of God more accurately.

When he had determined to pass over into Achaia, the brothers encouraged him; and wrote to the disciples to receive him. When he had come, he greatly helped those who had believed through grace;