John 17:21

that they all may be one, as thou, Father, art in me, and I in thee, that they may be one in us--The indwelling Spirit of the Father and the Son is the one perfect bond of union, knitting up into a living unity, first all believers amongst themselves; next, this unity into one still higher, with the Father and the Son. (Observe, that Christ never mixes Himself up with His disciples as He associates Himself with the Father, but says I in THEM and THEY in US). that the world may believe that thou hast sent me--sentest me. So the grand impression upon the world at large, that the mission of Christ is divine, is to be made by the unity of His disciples. Of course, then, it must be something that shall be visible or perceptible to the world. What is it, then? Not certainly a merely formal, mechanical unity of ecclesiastical machinery. For as that may, and to a large extent does, exist in both the Western and Eastern churches, with little of the Spirit of Christ, yea much, much with which the Spirit of Christ cannot dwell so instead of convincing the world beyond its own pale of the divinity of the Gospel, it generates infidelity to a large extent within its own bosom. But the Spirit of Christ, illuminating, transforming, and reigning in the hearts of the genuine disciples of Christ, drawing them to each other as members of one family, and prompting them to loving co-operation for the good of the world--this is what, when sufficiently glowing and extended, shall force conviction upon the world that Christianity is divine. Doubtless, the more that differences among Christians disappear--the more they can agree even in minor matters--the impression upon the world may be expected to be greater. But it is not dependent upon this; for living and loving oneness in Christ is sometim…

This chapter is a prayer, it is the Lord's prayer, the Lord Christ's prayer. There was one Lord's prayer which he taught us to pray, and did not pray himself, for he needed not to pray for the forgiveness of sin; but this was properly and peculiarly his, and suited him only as a Mediator, and is a sample of his intercession, and yet is of use to us both for instruction and encouragement in prayer. Observe, I. The circumstances of the prayer (Joh 17:1). II. The prayer itself. 1. He prays for himself (Joh 17:1-5). 2. He prays for those that are his. And in this see, (1.) The general pleas with which he introduces his petitions for them (Joh 17:6-10). (2.) The particular petitions he puts up for them [1.] That they might be kept (Joh 17:11-16). [2.] That they might be sanctified (Joh 17:17-19). [3.] That they might be united (Joh 17:11 and Joh 17:20-23). [4.] That they might be glorified (Joh 17:24-26).

17:21 For believers, becoming one with one another is an outgrowth of the union they enjoy with Jesus himself, a union modeled on the oneness of the Father and the Son. • may they be in us: Through the power of the Spirit, believers would experience a profound spiritual intimacy with the Father and the Son and be transformed (14:20, 23; 1 Jn 4:13). • Disciples of Jesus represent him, so their conduct and relationships with each other reflect the credibility of Christ in the world. When there is disunity, infighting, and intolerance, their testimony to the world is unconvincing. When people observe the community of believers, they know that it represents Jesus; a unified, loving community convinces the world to believe (John 13:35; 1 Jn 3:11).