He sees one family, all loved alike by one Father, indwelt by one Spirit. In the Gospel he sees one flock, all having eternal life, and all safe in the hand of one Shepherd. It is true that here, as well as in John 10, the Holy Spirit foretells trouble from those who should succeed the apostles. Unlike the thief, the good Shepherd came that His sheep might have salvation, liberty, and life abundantly. I and My Father are one.
Every sheep is included in the grasp of love and omnipotence.
He speaks of inclusive oneness. The violent exclusiveness of Diotrephes was evil. It excluded the best. That is the path which is surrounded by the abiding blessings of God.