The blood of Jesus Christ is so vital to our salvation that there is no way that you and I could be saved apart from the shedding of Jesus’ blood. Any church or any doctrine that minimizes the blood of Jesus Christ, literally shed on the cross of Calvary, and substitutes it with his mere death or with wine is heretical.
The blood of Jesus:
Propitiates – (Rom 3:25) Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God. To propitiate means to appease. Each one of us, before we were saved, was under the wrath of God (Jn 3:36). When we put our faith in Jesus, the wrath of God was appeased and we were saved from his wrath (Rom 5:9).
Redeems – (Eph 1:7) In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace. As sinners, we were children of the devil (1 Jn 3:10). By his death, burial and resurrection, Jesus bought us back from the devil and made us God’s children (Jn 1:12).
Makes peace – (Col 1:20) And, having made peace through the blood of his cross, by him to reconcile all things unto himself; by him, I say, whether they be things in earth, or things in heaven. We were without peace as wicked sinners (Is 48:22). But after Jesus bled and died and we were saved, we were at peace with God, having been reconciled to him by Jesus Christ (Rom 5:1; 2 Cor 5:18).
Cleanses – (1 John 1:7) But 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. Each time you sin, your body and your spirit are made filthy [your soul is not affected because of the forgiveness of Jesus and the new birth by the Spirit]. Therefore, you have to have a way to cleanse your flesh and your spirit from this filthiness (2 Cor 7:1). The blood of Jesus Christ is what God has given us to take care of that very problem.
Purges – (Heb 9:14) How much more shall the blood of Christ, who through the eternal Spirit offered himself without spot to God, purge your conscience from dead works to serve the living God? Our consciences before we were saved were evil (Heb 10:22), having been defiled (Tit 1:15) and seared by sin (1 Tim 4:2). But after each of us received Jesus, we could plead the blood and God would apply it to our conscience to purge it from those old sins and clean it up, thereby giving us a good conscience (1 Pet 3:16). And you can do the same thing with any sin and ask God to purge your conscience to keep it clean so that you may serve him.
Conclusion: There are other things that Jesus does for us but these are the principle things. If you are saved, trust the blood of Christ to cleanse you from sin and to purge your conscience. If you are lost, trust Jesus to save you.