Isaiah 60:1

Arise (from spiritual depression to a new life), shine (be radiant with the glory and brilliance of the Lord) for your light has come, and the glory and brilliance of the Lord has risen upon you.

We have received light through Jesus and salvation, and we are to reflect the light here on earth. We were living in darkness, but we have been transformed into a new life. Our light is to bring others to God and show the glory and compassion of a loving God. We are to let our lights shine so that others may see and be a beacon of hope where there is no hope.