Luke was a physician by profession (col 4:14) and he was a good friend to Paul and fellow worker ( Phm 24). Luke was a Gentile by birth, He was well educated in the Greek culture. A physician by profession , a companion of Paul. He was with Paul various times from his second missionary journey to Paul’s final imprisonment in Rome. Luke was a loyal fried who remain with the Apostle after others had deserted him (2Tim 4:11)