I think the problem lies with the view we have of time; how can a Christian be forgiven but still wrestle with sin & do things that are sin.
Revelations is symbolic with respect to amount of years.
1000 years is a metaphor, not a literal “1000 years”.
Sin is real; its a residual, as it were, from the Fall ( “all have sinned & fallen short”) and originated with Lucifer/Satan.
Born again Christians still have sin/can sin, but they also have the indwelling of the Holy Spirit on account of Christ’s work at Calvary.
Satan is limited/chained/short-leashed; a beaten adversary.
Says who?
>>Satan is limited/chained/short-leashed; a beaten adversary.<<
Who do you think you are kidding?
Ephesians 2:2 Wherein in time past ye walked according to the course of this world, according to the prince of the power of the air, the spirit that now worketh in the children of disobedience:
1 John 5:19 We know that we are children of God, and that the whole world is under the control of the evil one.
Corinthians 4:4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.
Anyone who teaches that Satan is limited or chained doesn't know scripture very well.