Parts I, II, III, IV, and V can be found here, here, here, here, and here, respectively.
The full form of the Jesus Prayer, “Lord Jesus Christ, Son of God, have mercy on me, a sinner,” incorporates at least six biblical promises. These are:
1. Romans 10:9 — If you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved. (cf. John 6:40; Romans 10:10-13)
2. 1 Corinthians 12:3 — No one can say “Jesus is Lord” except in the Holy Spirit. (cf. John 15:26)
3. 1 John 5:1 — Everyone who believes that Jesus is the Christ has been born of God, and everyone who loves the Father loves whoever has been born of him. (cf. Matthew 16:16-17)
4. 1 John 4:15 — Whoever confesses that Jesus is the Son of God, God abides in him, and he in God. (cf. Romans 8:16-17; 1 John 2:23, 5:10)
5. John 14:14 — If you ask me anything in my name, I will do it. (cf. John 14:13, 15:16, 16:23-24)
6. 1 John 1:9 — If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. (cf. Luke 18:14)
On the Sixth Promise
By confessing our sins to God, we not only offer them up in humility to be forgiven in Christ, but also offer our very souls to be cleansed. This is a twofold reality, and is grounded in the verse in 1 John preceding, which states, “If we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin” (1 John 1:7). In other words, the shed blood of Christ cleanses us from both the guilt and the stain of sin. Sin, which is an action, is also and more fundamentally like a progressive disease which inheres to and corrupts our souls unto death. In other words, sin is a spiritual sickness which produces sinful action. Just like how an infectious disease produces fever, so the infection of sin produces sinful action. Thus not only the symptom of sin's fever must be treated, but also the fundamental corruption of the disease of sin must be healed. And so the blood of Christ effects a double action: one which deals with the symptom, which is to say the fever of sin; and another which deals with the more fundamental cleansing, which is to say the underlying disease of sin. Both aspects are found through the sacrifice of Christ on the Cross. The spilling of His righteous blood, which we receive in childlike faith as being given on our behalf, acts so as to objectively forgive the sin which we have committed. Not stopping there, it also works to restore us to cleanse us of all unrighteousness. This cleansing is the restoration of fellowship with God in Christ. What a mighty promise! And this is why confession is such a vital subject, and can never be treated flippantly as if it were optional, as if it were some superficial listing of mistakes, or as if it were simply a matter of regret for wrongs done. Confession must go all the way to the heart of the problem, the rupture of fellowship with God due to our hardened hearts and our stiff necks. Sin is such a corruption that God decided that the death of Christ on the Cross was the best way to deal with it. And so the forgiveness of sin and the cleansing of all unrighteousness came together at a great cost, and yet it is freely extended to all. Thus through confession not only does He promise to forgive and cleanse, but also to reestablish communion with Him as you walk in the Light that is Christ.
