Luke ( or Loukon at that time) began life as a slave in Antioch to a wealthy Greek trader Theophilus. At an early age his curiosity fore told of great things that this young slave may become. Theophilus being a stoic in those times was very kind to this young boy and favored him over all the others. Luke at an early age had a flair for working with the injured slaves and helping the resident physician in his attending the ill.
Luke had two interest growing up. History and Medicine. His master Theophilus fore saw him as a physician and promised to finance him attending a university to become a Doctor as well as being granted his freedom.
When Luke entered the university, he also shortened his name to Luke. There he met also a new student called Saul ( later to be called Paul). Needless to say their relationship at the university was not the best being Saul was Hebrew and Luke was a Gentile. During Luke's stay at the university, he was seriously dedicated to learning medicine and became a man of medicine, returned to serve as a physician for Theophilus, and served as a physician on the sailing ships after he earned his freedom.
It was shortly after that when Luke began to hear of Jesus and His miracles He was doing in Judea and Israel. He also heard of Jesus being put to death on the cross. Over time Luke had head more stories of the Disciples and their teachings about Jesus but he continued to rebuke the stories as just that. Certainly a learned man such as he could not believe in these stories.
It was only after seeking out his old university associate Saul of Taurus at a chance meeting boarding a ship as the physician that he ran into Saul of Taurus. During this voyage Luke learned of Paul's ( Saul) new conversion as a disciple of Jesus and actually witnessed a healing of one of the ship mates by Paul. Paul also told Luke of his conversion by the Holy Spirit and Jesus appearing on the road.
This was the beginning of Luke as a believer and later as a Historian to record the many miracles and teachings of Jesus through interviews with the apostles and Jesus' mother Mary. He also became a teacher and elder at the Antioch church as well as writing the church history.
Luke also got the opportunity to travel with Paul, Barnabus, and others to spread the good news through out the areas of that time. After Paul's capture and imprisonment, Luke would visit frequently bringing in manuscripts from interviews with the disciples and Mother Mary for his review.
It can be said that Luke never was a witness to the miracles and teachings of Jesus first hand but he did a wonderful job of recording the history of the early Christian church and it's believers as well as becoming a teacher and elder after surrendering his life to serve Jesus and the church. With his writings and scrolls, one can almost sense they were there in those times as they were written through divine guidance of the Holy Spirit in God's grace.