Summary: Paul had a radical change by the gospel. His life was so radically changed that it was beyond what many could believe. Paul who had previously been the most fearsome persecutor of Christians is now preaching the gospel. He met Jesus.
The elements of a testimony in Christ can be divided into three sections. First is describes what life was like before coming to Christ. The second part is describing just how it happened at the time of meeting Christ. Then finally is describes what life was like after coming to Christ. When you put these three sections together in one testimony it highlights how someone was radically changed by the gospel.
Paul had a radical change by the gospel. His life was so radically changed that it was beyond what many could believe. Paul who had previously been the most fearsome persecutor of Christians is now preaching the gospel. How did this happen? He met Jesus.
For Paul it was an incredible conversion. Besides what we find in this passage in Galatians 1:11-24 (quickview)  we have a few other scriptures to tell us more. We find more about Paul’s testimony in Acts chapter 9 and Acts chapter 22. Paul’s life is a testimony to what God can do.
Paul continues this section of Galatians chapter one with what he already started. He is not a man pleaser; rather he is a God pleaser. The Judaizers brought a false gospel to the churches. Paul started his missionary work in the region of Galatia. Now those Judaizers who oppose Paul have attacked his character.
The introduction to Paul’s testimony
I want you to know, brothers, that the gospel I preached is not something that man made up. 12I did not receive it from any man, nor was I taught it; rather, I received it by revelation from Jesus Christ.
The gospel, the good news in Jesus Christ is not made up by man. What Paul preaches is from God. Man made religions have rules to obtain salvation. There is a system of works to reach God.
In the gospel God reached down by grace and He does it all. The price of salvation has been paid in full by Jesus at cross. We receive salvation as a free gift. No, it was not man made. The gospel Paul preached was revealed to Paul by Jesus Christ.
Paul’s life Before Christ
13For you have heard of my previous way of life in Judaism, how intensely I persecuted the church of God and tried to destroy it. 14I was advancing in Judaism beyond many Jews of my own age and was extremely zealous for the traditions of my fathers.
Before Paul met Christ he had a different name; it was Saul. He was born in the home of a strict Pharisee. Paul was a dedicated Pharisee himself. He was a prodigy and showed himself to be the best in Judaism. He studied under the best Rabi, Gamaliel who was a member of the prestigious Sanhedrin. Paul was a zealous Jew.
Paul hated the gospel of Christ. He hated those who preached it. He hated those whose lives had been changed by it. He did all he could to oppose the name of Jesus. He hated Christianity so much so that he even approved of Stevens death recorded in Acts 7 (quickview) .
He made murderous threats and had Christians imprisoned. He believed that Jesus was an imposter. He saw Christianity as a threat to his Judaism which was his whole life. Paul was obsessed with destroying the Christian faith. He was on his way to Damascus to arrest and persecute Christians when he saw the blinding light on the Damascus road.