Luke’s gospel is the longest book in the New Testament. When you consider it along with the other book that he wrote, namely the Acts of the Apostles, Luke is responsible for over a quarter of New Testament material.
Luke was one of Paul’s most significant companions and several things about him help us understand why God laid his hand upon this man. He was a Gentile, the only Gentile writer in the whole of the New Testament. He was also a doctor and an educated man. He was an historian. In fact, he was more of a historian than Matthew or Mark or even John, each of whom sets the life of Jesus firmly within the realm of Palestine. Luke intersects Biblical truth with the historical development of the Roman Empire.
There is much to learn by studying the gospel of this man of wide views and broad sympathies, most importantly his emphasis on the universality of the good news of our Lord Jesus Christ.