All mine are yours, and yours are mine, and I am glorified in them. And I am no longer in the world, but they are in the world, and I am coming to you. Holy Father, keep them in your name, which you have given me, that they may be one, even as we are one.
John 17:10-11 (ESV)
In the middle of Jesus' high Priestly prayer, He prayed for a radical sort of unity. He asked the Father to keep His followers unified in the name of the Father. The radical feature of this prayer is the analogy He used to describe the unity His followers ought to have: "they may be one, even as we are one." Essentially, Jesus is praying that Christians everywhere have the same level of unity that the Trinity have. This is possible because all Christians are directly, personally, mystically united with God. Therefore, they can be united fully with each other.
Do you see this kind of unity in your church, let alone the universal church? Lord, may we be so unified with You that we enjoy fellowship with one another, just as You enjoy communion with Your Father!