The Apostles in the Early Church were concerned about the gospel, the true Christian faith, being proclaimed, lived out faithfully and preserved to be passed on from generation to generation.
The Apostle Paul declares that “the gospel is the power of God at work, saving everyone who believes- Jews first and also non Jews.
This good news tells us how God makes us right in His sight.” (Romans 1:16-17 NLT). He wrote to the churches he had planted on his missionary journeys to warn them about false teaching and corrupt presentation of the gospel that had crept into the churches.