John 17:20. “Them also which shall believe on Me.” He now prays for the whole Church. We are all included here. He prays as the Head of the Body. He prays as our Representative. He is the Object on whom we believe: we believe in God; we believe in the Word of God, the Bible; but we believe on the Lord Jesus Christ as the Savior who took our place, died in our place, was wounded for our transgressions, whose blood cleanses us from all sin, who is now resurrected and lives for us. Justifying faith is: 1] Knowing what He has done, Isa.53:11 2] Assenting in the heart (believing on Him), 1Jn.5:10-11 3]Accepting Him, Jn.1:12 4]Trusting Him, Eph.1:13-14.
John17:21. “They all may be one…” The unity of the children of God: Unity of the Spirit, Eph.4:3. Unity of the faith, Eph.4:13. Unity of heart (they were of one accord), Acts 4:32. Unity of love (knit together in love), Col.2:2. Unity of peace (bond of peace), Eph.4:3. Unity of mind (perfectly joined together, of the same mind), 1Cor.1:10. Unity of judgment (discernment), 1Cor.1:10. The divine union of the Son of man and the Son of God is the closest possible union (hypostatic union); the union of love of the Father and the Son and the union of the will of the Father and the Son are close unions. “They may be one in us…” God, the fountainhead from which we draw. Christ, the channel through which blessings flow. Holy Spirit, the power through which we serve. “That the world may believe…” The character of Christians is the Bible the world reads. The closeness of the Christians shows the love the world needs. The Christ-likeness of the Christians reveals the honor and happiness the world needs.
John17:22. “Even as we are one.” Union with God, with Himself, in Himself; is still there. Union with the Almighty is the greatest of all conceivable blessings. Union with God provides the grace needed: salvation, justification, sanctification and fruitfulness are all of God’s grace.