Knowing the right gospel

Acts 18:24-19:7
Aquila and Priscilla took him aside and explained to Apollos the way of God more accurately. And when Apollos desired to cross to Achaia, the brethren wrote, exhorting the disciples to receive him. Apollos greatly helped those who had believed through grace; for he vigorously refuted the Jews publicly.
Paul at Ephesus when Apollos was at Corinth. Paul baptized them in the name of the Lord Jesus. Now the men were about twelve in all.
Thanks to Aquila and Priscilla's instruction, the eloquent Apollos became a man of great influence in the Corinthian church.
Alexandria: This city on the Mediterranean coast of Egypt was a center of learning and home of the Jewish philosopher.
Why?
Even those men in Ephesus were Christian but they did not be baptized in the name of the Lord Jesus, after Paul's teaching and laid hand on them.
Encourage Christian may increase their faith and more accurate to be a Christian.
Aquila and Priscilla did the good instruction to Apollos, took him aside and explained to him the truth. Then he could be good helper to many.
How?
Knowing the right gospel. Experience the power of God and let my life be changed.