And I saw no temple in the city, for its temple is the Lord God the Almighty and the Lamb. And the city has no need of sun or moon to shine on it, for the glory of God gives it light, and its lamp is the Lamb. By its light will the nations walk, and the kings of the earth will bring their glory into it. Revelation 21:22-24.
How often we reach for the light switch when it is dark. It isn’t just to reassure small children, but for older people, too. My grandparents didn’t have electricity when I was young, and used oil for light. A burning oil lamplight didn’t reach into the shadows of the corners of the room.
The third verse of the Genesis 1 proclaims, And God said, “Let there be light,” and there was light. And God made the two great lights—the greater light to rule the day and the lesser light to rule the night—and the stars. And God set them in the expanse of the heavens to give light on the earth, Genesis 1:16-17.
In the New Jerusalem, there is no need for a temple or light, God is our light. Jesus is our Lamp. There is no off-switch. There is no power shortage in Heaven. John is told these words are true. On earth we find darkness, and try to hide from God, but in Heaven there is no night, the Light is eternal.
They will see his face, and his name will be on their foreheads. And night will be no more. They will need no light of lamp or sun, for the Lord God will be their light, and they will reign forever and ever. And he said to me, “These words are trustworthy and true. And the Lord, the God of the spirits of the prophets, has sent his angel to show his servants what must soon take place.” Revelation 22:4-6.