An important part of the descent of the holy city is the imagery it provides. John views the city as “coming down out of heaven from God, made ready as a bride adorned for her husband” (Rev. 21:2). John MacArthur notes well that this imagery is of the third part of the Jewish wedding ceremony. The first part is of the churches betrothal to Christ in eternity past (Eph. 1:4), where the Father chose us to marry His Son. The second part is where the church is presented to Christ; this takes place at the rapture of the church (1 Thess. 4:13-18). The third part of the ceremony is the exchange of vows, followed by the marriage supper (Rev. 19:7). In real time this will last for one thousand years—the millennium.
Now the marriage supper ends at the end of the millennium; and then, when God creates the new heaven and earth, this is when the bride (all believers) comes to her husband (Jesus Christ) to consummate the marriage (Rev. 21:2). Notice the wording here; she is “made ready as a bride adorned for her husband.” Yes. She has made herself ready and will give herself to her husband.
Now there is something else I would like to mention. I think there is a more extensive imagery here. It is the fact that the holy city is Christ’s wedding gift to us—that place that He has been preparing for us (John 14:2-3). Thus I see that His gift to us is both our home with Him in the Father’s house, living in His presence; and it is also the gift of our salvation and purity, that He will make us pure and ready for Him, our husband.