Personal interaction with Jesus Christ was life-changing for Paul. His identity and purpose were reshaped. This relationship was now foundational and most important for him. Responding to the opposition and false accusation, Paul did not point to his own heritage in ancestry, ethnicity, education, accomplishments, or economic standing as most important. Paul points to Jesus. False teachers mentioned in Acts 15:1 had been following the apostles’ church planting travels. They sought selfish gain by earning recognition. They taught a mixture of Jesus’ teaching and Jewish customs added to Moses’ teaching. This resulted in the twisted idea that salvation came by faith and works, and that we are “perfected” by good works. Paul writes to teach our freedom by faith in Jesus and to refute this perversion. Have you considered the book “Travelling Light” by Eugene Peterson (about Galatians)?