When we picture the millennium, we think of the happiness and joy that all humanity on earth will experience at that time. We also think of the happiness we as the spirit-born Sons of God and first fruits will experience being in the Kingdom of God.
But God the Father and Jesus Christ will also experience joy during that time.
How long has God the Father and Christ been planning to expand God's family? How long has God been planning to reproduce Himself? For thousands of years, certainly. For millions of years? For billions of years? Probably. For Eternity? Possibly.
And now, in the near future, it is finally about to happen!
For the first time in the history of the universe, the Family of God will expand to include more than just the Father and the Word who became Christ. The first stage of God's plan and purpose for mankind will have been accomplished. The first fruits will have been born by a resurrection from the dead or instantaneous change from mortal to immortal at the return of Christ. Tens of thousands of the Father's children will have been born (1 Corinthians 15:50-57, 1 Thessalonians 4:15-17, Romans 8:29, Revelation 14:1-5).
And Christ will enjoy the first one thousand years with His new wife in a marriage that will last for eternity. For the first time, Christ will have a bride that is like Him, compatible with Him, glorified as He is glorified, righteous, trustworthy, and faithful (1 John 3:1-2). There will be no divorce from that marriage. There will be no marriage problems. It will be a perfect marriage. It will be a gloriously happy marriage for eternity, and Christ will know it absolutely, and we will know it too. The resurrected Church will be that wife (2 Corinthians 11:2, Ephesians 5:25-32, Revelation 19:6-8).
Christ will for the first time in thousands of years be able to see Abraham again, and Isaac, and Jacob, Noah, Moses, David, and also the apostle He loved, John, as well as all the prophets and saints who have lived in the last 6,000 years, both those we know about and those we never heard of, and including all of us who make it into the Kingdom. Christ will be able to see all of us together. And He will give us our jobs and assignments and direct us in our work. He will have the pleasure of rewarding us and sharing His joy with us in a fuller measure than He ever could while we were mortal in this physical life (Matthew 25:20-23).
What a glorious time that will be for God, for Christ, and for all the saints.
Here are links to related sections in Preaching the Gospel:
The Feast of Tabernacles - the Millennial Rule of Christ, Chapter 2
God's Purpose for Mankind, Chapter 2