At the end of Matthew's gospel, Jesus instructs his disciples: "All authority in heaven and on earth has been given to me. Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you; and lo, I am with you always, to the close of the age" (Matthew 28:16-20). Once again, the Light is on the move.
How does light move? Differently, depending on its courier. One can imagine a party of explorers in a darkened cave with miners' helmets shining, or a water craft's navigation lamps quietly passing in the night, or a black forest with the searching beams of rescuers seeking a lost child -- Light on the move as it has always been since Jesus walked the paths of Galilee.
How Do…