18 Violence will not be heard in your land any more, nor devastation or destruction within your borders; you will call your walls Salvation, and your gates Praise. 19 The sun will no longer be your day light, neither will the moon give light to you for brightness by night; but Yahveh will be your permanent light, and your God will be your glory. 20 Your sun will go down no more, nor will your moon withdraw itself; because Yahveh will be your permanent light, and your days of mourning will have been completed. 21 All of your people will be righteous ones; they will possess the land permanently. They are the shoot that I planted, the work of my hands, to show my glory. 22 The smallest of them will become a clan, and the most insignificant one a mighty nation; I am Yahveh; when its time comes, I will do this quickly.
Earlier in this chapter, Isaiah had challenged his people to be light in their dark world. Now, he promises a future day when that light will completely overtake the darkness. He encourages them to think of the future when there will be no more sun or moon to light the land, only the permanent light of God’s glory, shining through his people. In fact, he says that showing God’s glory was the very reason that he planted them. The particular darkness that Isaiah had in mind is described as violence, devastation and destruction, and its accompanying emotion: mourning. The light indicates that the mourning is over, and peace, fulfilment, wholeness and joy has come again. The Light is the actual presence of Yahveh himself.
That promise is the backdrop we need for an accurate understanding of the pictures of the holy city in John’s Revelation. In the future holy city, nothing changes in regard to the source of our peace and righteousness. The source of our light stays the same. The presence of God in us and through us stays the same.
LORD, shine through us, and let our roughness never hide your glow. Shine through us, and may the dark world around us come to know that you are its permanent light.
 Revelation 21:23; 22:5.