Luke’s Gospel begins and ends in Jerusalem. His sequel, the Book of Acts, begins in Jerusalem but ends in Rome. Theologically, this is movement from heritage to mission: holding on to the heritage but moving forward into mission. In the same way, we need to be grounded in the Scriptures, so our action will be consistent with all that God has done before us, yet also moved by the Spirit, so we can reach those parts of humanity not yet reached.