There is No Other Offering But the Blood

"Now where remission of these is, there is no more offering for sin." (Hebrews 10: 18)

Jesus' blood did away with our sins forever.

"But this man, after he had offered one sacrifice for sins for ever, sat down on the right hand of God;" (Hebrews 10: 12)

These sins are put away from us, and we no longer identify with them. Only when we forget this do we find ourselves not living a victory:

"But he that lacketh these things [traits of godly character] is blind, and cannot see afar off, and hath forgotten that he was purged from his old sins." (2 Peter 1: 9)

We do not remove our sins through anything that we have done, but rather everything which Jesus did:

"4But God, who is rich in mercy, for his great love wherewith he loved us, 5Even when we were dead in sins, hath quickened us together with Christ, (by grace ye are saved;) 6And hath raised us up together, and made us sit together in heavenly places in Christ Jesus:" (Ephesians 2: 4-6)

and then

"13And you, being dead in your sins and the uncircumcision of your flesh, hath he quickened together with him, having forgiven you all trespasses; 14Blotting out the handwriting of ordinances that was against us, which was contrary to us, and took it out of the way, nailing it to his cross; 15And having spoiled principalities and powers, he made a shew of them openly, triumphing over them in it." (Colossians 2: 13-15)

All our trespasses are forgiven because of Jesus' death, and through His death the Mosaic law was fulfilled, and rendered inoperative against us (Matthew 5: 17, Hebrews 8: 13)

In the last days, the greatest fight would be with those who believe that Jesus did not finish the work/ They would not deny that He never existed, or that He never died, but that He did not finish the work:

"O foolish Galatians, who hath bewitched you, that ye should not obey the truth, before whose eyes Jesus Christ hath been evidently set forth, crucified among you? 2This only would I learn of you, Received ye the Spirit by the works of the law, or by the hearing of faith? 3Are ye so foolish? having begun in the Spirit, are ye now made perfect by the flesh? 4Have ye suffered so many things in vain? if it be yet in vain." (Galatians 3: 1-4)

and

"(For many walk, of whom I have told you often, and now tell you even weeping, that they are the enemies of the cross of Christ: 19Whose end is destruction, whose God is their belly, and whose glory is in their shame, who mind earthly things." (Philippians 3: 18-19)

And also

"3Beloved, when I gave all diligence to write unto you of the common salvation, it was needful for me to write unto you, and exhort you that ye should earnestly contend for the faith which was once delivered unto the saints. 4For there are certain men crept in unawares, who were before of old ordained to this condemnation, ungodly men, turning the grace of our God into lasciviousness, and denying the only Lord God, and our Lord Jesus Christ." (Jude 3-4)

There is no other way for our sins to be put away forever, because in order to have eternal, there had to be a sacrifice of eternal consequence, the blood of Jesus, which keeps on cleansing us (1 John 1: 7)