This is the Lord’s prayer to His Father. Jesus wanted all that the Father had decided, to come to pass.
V.1-5 The glory of the Lord Jesus, as Son of the Father, is opened up to us.
V.6-19 Jesus puts His disciples in His own relationship with the Father. They are brought into the place that He was as a Man before God the Father. He prays that they might enjoy this place of blessedness.
V.20-21 Others would believe later. We are some of these. All believers are brought into the same blessing of oneness in the Father and the Son.
V.22-26 Here we get a glimpse into our eternal position in the glory. There is going to be complete oneness. We are going to see the glory of the Son. But they (and we) are to enjoy this wonderful relationship now.