1 John 3
4 Whoever commits sin also commits lawlessness, and sin is lawlessness.5 And you know that He was manifested to take away our sins, and in Him there is no sin.
6 Whoever abides in Him does not sin. Whoever sins has neither seen Him nor known Him.
7 Little children, let no one deceive you. He who practices righteousness is righteous, just as He is righteous. 8 He who sins is of the devil, for the devil has sinned from the beginning. For this purpose the Son of God was manifested, that He might destroy the works of the devil.
9 Whoever has been born of God does not sin, for His seed remains in him; and he cannot sin, because he has been born of God.
For those born of God our sins are forgiven for His name sake, Our sins are forgotten by God. Just like they never were, we are washed clean by the blood of the Lamb. The wages of sin are death, so obviously since those born of God are eternally alive, their sins are gone, no longer have any significance to eternal life of those born of God. They are new creatures, new creations in Christ, all the old sins are gone, done away with, there is no longer any sin separation between God and those born of God , everything for them is new and fresh and clean and good.
Hebrews 8:12
For I will be merciful to their unrighteousness, and their sins and their lawless deeds I will remember no more.”
And Christ has put away their sin by His blood sacrifice.
Hebrews 9:26
He then would have had to suffer often since the foundation of the world; but now, once at the end of the ages, He has appeared to
put away sin by the sacrifice of Himself.