Was the understanding of the apostles growing over time?
If their knowledge given by the Holy Spirit was increasing then the gospel message
and it's implications. Will over time become better defined and explained.
Paul is the only author in the N.T that both explains the gospel and tells us what the gospel was
(1 Corinthians 15) that he received.
Paul had the sole duty of delivering the gospel of Jesus Christ to the Gentile world.
Paul should be your first point of contact in the scripture.
Jesus speaks powerfully through the apostle Paul.
Paul explains almost everything in Christianity.
Yes, the apostles’ understanding
did grow over time, but it always grew
from what Jesus already taught, not beyond it. Jesus promised the Holy Spirit would remind them of
His words, not replace them.
Jesus said:
“He will teach you all things, and bring to your remembrance all things that I said to you.”
John 14:26 NKJV
That means the Spirit clarified and strengthened their understanding. He did not introduce a different gospel.
The gospel itself was already preached by Jesus before Paul. Jesus spoke of His death, resurrection, repentance, forgiveness of sins, and obedience to God. After His resurrection, He commanded the apostles to teach
everything He had taught them to all nations (Matthew 28:19–20).
Paul did explain the gospel clearly, especially to Gentiles, and his explanation in 1 Corinthians 15 is valuable. But Paul himself says the gospel he preached was
received, not invented, and it agrees with what was already proclaimed.
Paul was not the only one sent to Gentiles. Peter preached to Cornelius in Acts 10 before Paul’s Gentile mission fully began, and James, John, and the other apostles affirmed the same gospel in Acts 15.
Paul is an important teacher, but he is not the first point of contact. Jesus is. Paul himself points us back to Christ, saying we are to be built on the foundation of the apostles and prophets, with
Jesus Christ Himself as the chief cornerstone(Ephesians 2:20).
Paul helps explain the faith, but Jesus defines it.
The Spirit does not move us away from Jesus’ words.
He moves us deeper into them.