Luke is a most vigorous champion of the outsider. An outsider himself, the only Gentile in an all-Jewish cast of new Testament writers, he shows how Jesus includes those who typically were treated as outsiders by the religious establishment of the day: women, common labourers, sheep-herders, the racially different, the poor. He will not countenance religion as a club. As Luke tells the story, all of us who have found ourselves on the outside looking in on life with no hope of gaining entrance, and who of us hasn’t, now find the doors wide open, found and welcomed by God in Jesus.
From the introduction to the Gospel of Luke by - Eugene Peterson, “The Message.”