John 17:20-26: 20 “I do not pray for these alone, but also  for those who will believe in Me through their word; 21 that they all may be one, as You, Father, are in Me, and I in You; that they also may be one in Us, . . . that they may be one [with each other] just as We are one: 23 I in them, and You in Me; that  they may be made perfect in one, and that  the world may know that You have sent Me, and [You] have loved them as You have loved Me. 4“Father, I desire that they also whom You gave Me  may be with Me where I am, . . . that  the love with which You loved Me may be in them, and I in them.”
What does this mean? “I do not pray for these alone [the original disciples (apostles)], but also for those who will believe in Me through their word.” It means that Jesus was also praying for us; each one of us. WE are ones who have believed in Jesus through the teaching and the preaching of Peter, James, John, and the others. So Jesus was praying for you (and me).  Jesus is praying that we (all of us who trust Him) will be one with Him, with the Father, and with each other; all at the same time. To me that is the same situation that is expressed when Jesus says, “When you trust in Me, the Holy Spirit comes to dwell in your heart.” Somebody said it was not just about us trusting God, but also about God trusting us. What an idea!
 “That they may be made perfect in one” [perfect in this case means: whole, entire, wanting nothing] This is just crazy. With a few people I go to church with; with a few of those I serve with in various ministries, I count us as having a ‘perfect’ relationship, [whole, entire, wanting nothing]; they are people I actually spend time with almost every week, They are people I actually know; who they are, where they came from, what they think, how we feel about each other, about Jesus and about the world. In a real sense, we DO have a ‘perfect’ relationship with each other because God/Jesus’ Spirit is in us. Someone said, “The Spirit in me is speaking to the Spirit in you.” The way this feels, I want to spend a lot more time exploring my relationships with those people. God only knows what might happen if we both focused a little attention on what is happening there.
 The world may know that You have sent Me, and [You] have loved them as You have loved Me. This means that when we’re all ONE, that’s God, Jesus, you and me; then the whole world will KNOW that God sent Jesus, and that God loves us (you and me) as much as God has loved Jesus. How’s that?!!!
 “Father, I desire that they also whom You gave Me may be with Me where I am . . .” Now I suppose that some people might think that this means that we are going to get to be with Jesus when we all get to heaven. I personally believe that since heaven begins here, when we truly surrender to Jesus, die to our natural selves, and let His eternal life come to dwell in us by His Spirit, right then (right now!) we get to be with Jesus where He is, which is right here in our hearts.
 “The love with which You loved Me may be in them, and I in them.” Jesus is saying that God’s love is in us, and Jesus is in us. Folks, I’m absolutely convinced that if you trust Jesus enough to surrender your life to Him, He IS IN YOU by His Spirit right then, which is an answer to and fulfillment of this prayer that Jesus prayed. This IS what Jesus prayed.