When Apollos wanted to go to Achaia, the believers encouraged him and wrote to the disciples there to welcome him. When he arrived, he was a great help to those who by grace had believed.
NIV
And when [Apollos] wished to cross to Achaia (most of Greece), the brethren wrote to the disciples there, urging and encouraging them to accept and welcome him heartily. When he arrived, he proved a great help to those who through grace (God's unmerited favor and mercy) had believed (adhered to, trusted in, and relied on Christ as Lord and Savior).
AMP
And when he was disposed to pass into Achaia, the brethren wrote, exhorting the disciples to receive him: who, when he was come, helped them much which had believed through grace:
KJV
