Who was Luke? Was he one of Paul's companions? Was he a doctor? We do know that he was educated and cultured, writing for people far away from where Jesus lived. In his Gospel, we find the foundation of our Christmas stories and the best-loved parables, those of the Prodigal Son and the Good Samaritan. We see Jesus' concern for the poor and the marginalized, especially women and children. And it's Luke who tells us of the repentant thief on the cross...