1 John 1:7
Walk in the Light as He Himself is in the Light, we have fellowship with one another, and the blood of Jesus His Son cleanses us from all sin.
In order for something dirty to be cleaned something clean has to get dirty. I wiped the rag against the glass. The glass became clean but the rag was dirty. In the washer the rag is cleaned the water gets dirty. The water flows through the pipes to a filter. The water is cleaned the filter is dirty.
In the body, blood transports fuel and oxygen to the cells after the fuel is burned it transports the exhaust (water and carbon-dioxide and other waste products) to the kidneys and the liver, the body's filters. The kidneys filter excess water and other waste products from the blood. The liver filters poisons from the blood such as alcohol.
In the Bible there are three purifying agents water, blood, and fire. Water and blood clean by transporting the dirt and sin; while fire burns it away.
2 Corinthians 5:21
He made Him who knew no sin to be sin on our behalf, so that we might become the righteousness of God in Him.
Some time during the trial of Jesus he became sin. This sin flowed through his veins and polluted the filters in his body.
For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord.
12"You shall take some of the blood of the bull and put it on the horns of the altar with your finger; and you shall pour out all the blood at the base of the altar.
13"You shall take all the fat that covers the entrails and the lobe of the liver, and the two kidneys and the fat that is on them, and offer them up in smoke on the altar.
14"But the flesh of the bull and its hide and its refuse, you shall burn with fire outside the camp; it is a sin offering.
He will tread our iniquities under foot Yes, You will cast all their sins Into the depths of the sea
As far as the east is from the west, So far has He removed our transgressions from us.
Everything that can stand fire, you shall make go through fire, and it shall be clean.
When you walk through the fire, you will not be scorched, Nor will the flame burn you.
When Jesus died His blood kidneys and liver carried the sin, sickness, and sorrows through the fires of hell. The flames could not touch Him because He was sinless but the flames burned the sin, sickness and sorrows away in the sea of God's forgetfulness the lake of fire.
17Jesus said to her, "Stop clinging to Me, for I have not yet ascended to the Father
12and not through the blood of goats and calves, but through His own blood, He entered the holy place once for all, having obtained eternal redemption.
13For if the blood of goats and bulls and the ashes of a heifer sprinkling those who have been defiled sanctify for the cleansing of the flesh,
14how much more will the blood of Christ, who through the eternal Spirit offered Himself without blemish to God, cleanse your conscience from dead works to serve the living God?
After His resurrection He carried his blood, purified by fire, to the holy of holies in heaven and offered it on the alter.
This is how Jesus saved us from our sins, not merely the result of our sins but sin itself. We don't have to sin anymore.