Then I heard something like the voice of a great multitude and like the sound of many waters and like the sound of mighty peals of thunder, saying, “Hallelujah! For the Lord our God, the Almighty, reigns. Let us rejoice and be glad and give the glory to Him, for the marriage of the Lamb has come and His bride has made herself ready.” It was given to her to clothe herself in fine linen, bright and clean; for the fine linen is the righteous acts of the saints.(Revelation 19:6-8—NASB)
And I John saw the holy city, new Jerusalem, coming down from God out of heaven, prepared as a bride adorned for her husband.(Revelation 21:2)
His wife has made herself ready.
Prepared as a bride adorned for her husband.
The first of the these two appearances of the Bride of the Lamb takes place one thousand years before the second wedding.
The difference between the two weddings is as follows:
In the first wedding, the bride makes herself ready by performing righteous acts.
In the second wedding, it is likely that other people dress her to please her husband. In fact, this is what will happen. The firstfruits of the Bride, who were raised in the first resurrection, will assist in bringing the less mature members of the Bride to the level of maturity that the Lamb requires. This work of spiritual edification will take place during the thousand-year Kingdom Age and is the primary purpose for the Kingdom Age.
We have a little sister, and she hath no breasts: what shall we do for our sister in the day when she shall be spoken for? If she be a wall, we will build upon her a palace of silver: and if she be a door, we will inclose her with boards of cedar.(Song of Solomon 8:8,9)
You see, only a firstfruits of true, eternal Israel will be fully prepared, fully dressed, for the marriage to the Lamb when He next returns to earth. They have clothed themselves with righteous behavior. Their wedding is described in Revelation 19:6-8.