As the time was drawing near for Christ to give his life for the sins of the world, John 17 says that Jesus looked towards the heavens and told the Father all that he had accomplished his Mission in life.
He told the Father that the hour was finally here, and asked that He glorify His Son. Jesus said that as the Son was glorified, He would glorify the Father since He was given authority over all flesh to give eternal life to every one that the Father had sent him to die for.
Jesus plainly explains to the listeners of the prayer what eternal life is: knowing the One True God and knowing Jesus Christ that was sent by the Father. Jesus told the Father that he glorified Him on earth, having accomplished the work that the Father sent Him to do.
So that others before him would not mistakenly think that Jesus was simply a man praying to God, He said that He had accomplished the work that the Father gave him to do. He asked the Father to glorify Him with the same Glory that he had with the Father before the world even existed!
He told the Father that He had manifested His name, or authority, to the people He had given the Son out of the world. He said that these people were once the Father's, and the father had given them to the Son.
Jesus asked a special blessing for all the Father had given Him. Though he was leaving this world, He asked the Father to keep them undivided. Just as Christ was in unity with the Father, the body of Christ should be undivided.
At this point, Jesus established Christianity itself. He said that He had kept the people in the name of the Father, which they knew as Yahweh. Now that He was coming to the Father, he asked that they stand together as one body, undivided: Christians.
Jesus asked the Father to sanctify them in Truth, and said that the Word of God was Truth. For the sake of the people, Christ consecrated Himself, so that they would be sanctified in Truth.
This blessing was not only for those who were with Him. Jesus asked that this Truth be established for all who would believe in Christ by believing what these people said. The entire flock of people, one body with Christ, should be sanctified in Truth. Jesus asked that the body of Christ be made one with both the Son and the Father so that the world would believe that the Father had sent the Son.
Like a child standing up before his friends to his earthly father, Christ stood for his followers to the Heavenly Father. He said, "O righteous Father, even though the world does not know you, I know you, and these know that you have sent me. I made known 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."
As Christians, we should ask ourselves: Have we remained one body, united in Christ? Are there divisions in our churches? Are our churches divided from other Christians? Have we separated themselves, denying the Father by saying that Jesus was talking to Himself? Have we separated from the body of Christ, saying that Jesus was not One with the Father? Are we sanctified in Truth, which is God's Word, or are we pretending to sanctify ourselves by the words of man?