Luke was a physician. But not like what we think of when we think of a physician. There was no white coat. There was no large salary (in fact, many physicians were slaves). There was no immediate cultural respect. There was no fancy degree or education. There were no easily dispensed medications or diagnostic tools. But, in Luke's case,there was an intense desire to help those who suffered. Luke seems intimately connected with prodigals and misfits. Whether he was eating with them and listening to them or doing what little he could to soothe their physical pain and suffering, Luke loved and was devoted to the people that the world said were worth nothing.
Luke learned this from his master--Jesus.
Luke was a Greek gentile who had, at least, some familiarity with the person of Jesus even if he never actually saw Jesus.Instead, he heard the stories and found a faith growing in him that spurred him to change. He couldn't sit still and listen to these stories--they were too important simply to hear--and so he had to tell them to others. He would record the stories that meant so much to him by listening to others and reading what others had written. Beyond that, Luke knew that the stories of Jesus' disciples were critically important, as well. If Jesus had really brought a new Kingdom into the world, then his disciples would do amazing and wonderful things. Luke recorded these things in a letter that would be known as the Acts of the Apostles. Luke makes a few cameo appearances in this second work but does so in support of the Apostle Paul. When we see him, his character matches the voice in his text: intimatelyconcerned with the lives of the oppressed and unrepresented. Luke had been set on fire with a message of good news about a Kingdom that was changing the world and could only find relief in telling this story to others. His desire to heal became a desire to offer hope to desperate people.
Luke's mercy and soft heart for the invisible people can be seen in the stories that he chooses to highlight.Consider that Luke's gospel is the only gospel to tell the radical story of the Prodigal Son. Luke was a friend of the Prodigal and was excited about the God he saw in Jesus that was willing to love and forgive with fury and passion. This was no meek and mild god that stood aloof from creation but, rather, was a God who was elbows deep in the process of healing the voiceless and abused. Jesus was the Great Physician. Luke desired to be his apprentice. Luke's Gospel is the only Gospel to record Mary's response to God's calling: ""has brought down the powerful from their thrones, and lifted up the lowly; he has filled the hungry with good things, and sent the rich away empty."
Luke was energized by the work of healing that had begun in the Church. He recognized that the Kingdom was the possession of those who had no other possessions to prioritize. In this way, Luke characterized the prodigal nature of the Kingdom of God and their common savior Jesus.
He begins his Gospel by writing:
"Since many have undertaken to set down an orderly account of the events that have been fulfilled among us, just as they were handed on to us by those who from the beginning were eyewitnesses and servants of the word, I too decided, after investigating everything carefully from the very first, to write an orderly account for you..."Luke recognized the healing power of stories to change the minds and outlooks of people. He knew that the stories that we tell inform the way we think about things and so he wanted to pass them on. These were the possessions of the citizens of God's new Kingdom. These were the valuables that established value in the New World. This is what Luke passed on to us.