Saint Luke the Evangelist
Almighty God, who inspired your servant Luke the physician to set forth in the Gospel the love and healing power of your Son: Graciously continue in your Church this love and power to heal, to the praise and glory of your Name; through Jesus Christ our Lord, who lives and reigns with you, in the unity of the Holy Spirit, one God, now and for ever. Amen.
Almost all that we know about Luke comes from the New Testament. He was a physician (Col 4:14), a companion of Paul on some of his missionary journeys (Acts 16:10ff; 20:5ff; 27-28). Material found in his Gospel and not elsewhere includes much of the account of Our Lord's birth and infancy and boyhood, some of the most moving parables, such as that of the Good Samaritan and that of the Prodigal Son, and three of the sayings of Christ on the Cross: "Father, forgive them," "Thou shalt be with me in Paradise," and "Father, into thy hands I commend my spirit."
In Luke's account of the Gospel, we find an emphasis on the human love of Christ, on His compassion for sinners and for suffering and unhappy persons, for outcasts such as the Samaritans, tax collectors, lepers, shepherds (not a respected profession), and for the poor. The role of women in Christ's ministry is more emphasized in Luke than in the other Gospel writings.
In the book of Acts, we find the early Christian community poised from the start to carry out its commission, confident and aware of Divine guidance. We see how the early Christians at first preached only to Jews, then to Samaritans (a borderline case), then to outright Gentiles like Cornelius, and finally explicitly recognized that Gentiles and Jews are called on equal terms to the service and fellowship of Christ.
Luke is commonly thought to be the only non-Jewish New Testament writer. His writings place the life of Christ and the development of the early Church in the larger context of the Roman Empire and society. On the other hand, his writings are focused on Jerusalem and on the Temple. His Gospel begins and ends in the Temple, and chapters nine through nineteen portray Jesus as journeying from Galilee to Jerusalem. Similarly, the Book of Acts describes the Church in Jerusalem (and worshipping in the Temple) and then describes the missionary journeys of Paul as excursions from and returns to Jerusalem.*
*The Lectionary, James Kiefer, http://www.satucket.com/lectionary/Luke.htm