Apocalipse 21:24

The city will be so bright that it provides light for the whole new creation. The identity of the nations and kings mentioned is difficult to determine. The most probable explanation seems to be that the nations are groups of believers viewed according to their old creation nationalities, which they will retain in the new creation. The kings (rulers) probably are believing kings who ruled over nations during the old creation. [Note: See Thomas, Revelation 8-22, pp. 476-78, for 10 suggested identifications.] These kings will bring their glory into the city, thus increasing its glory, by simply entering it, since they are glorious individuals by God’s grace.