I do not ask for these only, but also for those who will believe in me through their word, that they may all be one, just as you, Father, are in me, and I in you, that they also may be in us, so that they world may believe that you have sent me. The glory that you have given me I have given to them, that they may be one even as we are one, I in them and you in me, that they may become perfectly one, so that the world may know that you sent me and loved them even as you loved me. Father, I desire that they also, whom you have given me, may be with me where I am, to see my glory that you have given me because you loved me before the foundation of the world. O righteous Father, even though the world does not know you, I know you, and these know that you have sent me. I made know to them your name, and I will continue to make it known, that the love with which you have loved me may be in them, and I in them.
The way the world will know that Jesus Christ is the Messiah sent from God is when His church is unified as one like He and the Father are one. This will not be easy! But the Bible never says that it's easy to be a follower of Christ. Can you imagine a church that is ethnically, socially, economically, educationally, giftedly, and a thousand other ways diverse and unified? This is the radical call of the church. We must strive for unity so that the world will believe. The gospel is at risk when we will not unite as one.