Revelation 21:10

John entered a fresh state of prophetic ecstasy and saw a new vision (cf. Revelation 1:10; Revelation 4:1; Revelation 17:3). The angel took him to a high vantage point from which he could see the New Jerusalem (lit. city of peace) descending out of heaven from God (cf. Revelation 21:2; Ezekiel 40:2). John received a fresh revelation that expanded something he had already witnessed in an earlier scene (Revelation 21:2-8; cf. Revelation 16:19; Revelation 17:1).

"The holy city descending from God out of heaven should be understood as a ’real event’ within the visionary experience. . . . The descent is an announcement in visionary terms of a future event which will usher in the eternal state. That the city comes down from God means that the eternal blessedness is not an achievement of man but a gift from God." [Note: Mounce, p. 378.]