These following scriptures and my teaching in red letters will show you the process of becoming sinless saints who will never sin again.
1 John 1:
7: but if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin.
9: If we confess our sins, he is faithful and just, and will forgive our sins and cleanse us from all unrighteousness. This is the one scripture in the Bible that shows a tiny bit about how to become sinless. The Romans deleted everything else from these scriptures that shows the true process of becoming a sinless saint.
When a chosen one of God's, who is still a sinner, hears the voice of truth in the gospel preached by a sinless saint, then he will keep listening until God reveals himself. Jesus preached to his disciples for a long time before God revealed himself to Peter so you can gauge the time it takes with Peter getting faith from God. At that point, Jesus knew that he had to die so Peter could be the next sinless man and preach the same gospel that Jesus preached.
After Jesus died, then God began his work on Peter by giving him commands to confess and repent of his sins. For each sin that was repented of, God would change his genetic trait to stop the power that caused Peter to sin. Eventually, the Word of God, or Holy Spirit of Jesus Christ, was able to forgive all his sins to make Peter a sinless saint. Then Peter received new thoughts in his mind and this is who Peter was created as in Christ. All the prophets and us saints were created in Christ, the Word but only us saints could be made sinless because we came after Jesus died. The prophets had to die as sinners without receiving the knowledge they were created with.
So this verse shows that we are made sinless if we confess our sins and justified by God in the form of repentance. Then he forgives us of all unrighteousness.
1 John 2:
3: And by this we may be sure that we know him, if we keep his commandments.
4: He who says "I know him" but disobeys his commandments is a liar, and the truth is not in him;
29: If you know that he is righteous, you may be sure that every one who does right is born of him.
1 John 3:
6: No one who abides in him sins; no one who sins has either seen him or known him.
9: No one born of God commits sin; for God's nature abides in him, and he cannot sin because he is born of God.
1 John 5:
2: By this we know that we love the children of God, when we love God and obey his commandments.
3: For this is the love of God, that we keep his commandments. And his commandments are not burdensome.
18: We know that any one born of God does not sin, but He who was born of God keeps him, and the evil one does not touch him.
Galations 5:
24: And those who belong to Christ Jesus have crucified the flesh with its passions and desires.
Romans 6:
20: When you were slaves of sin, you were free in regard to righteousness.
21: But then what return did you get from the things of which you are now ashamed? The end of those things is death.
22: But now that you have been set free from sin and have become slaves of God, the return you get is sanctification and its end, eternal life.
23: For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord.
John 8
31: Jesus then said to the Jews who had believed in him, "If you continue in my word, you are truly my disciples,
32: and you will know the truth, and the truth will make you free."
33: They answered him, "We are descendants of Abraham, and have never been in bondage to any one. How is it that you say, `You will be made free'?"
34: Jesus answered them, "Truly, truly, I say to you, every one who commits sin is a slave to sin.
35: The slave does not continue in the house for ever; the son continues for ever.
36: So if the Son makes you free, you will be free indeed.