Jesus (God the Son) voluntarily took responsibility for the sins of all believers.
In doing so, he performed the dual task of bearing the wrath of God (thus becoming “hamartia” for sinners’ sake) and restoring the sinners to righteousness. From an earthly time line we see an improvement that culminates in perfection in heaven. From an eternal time line it is already a done deal in God’s book.
I guess I would put it this way as far as the sin part goes.......like walking across a river full of every type of perversion and filth that sin is, was, and ever would be......He's God so it couldn't penetrate him but that doesn't mean it didn't feel the force of it....after all he smelled the stench of Sodom and Gomorrah...as it drifted to heaven so to speak.
Thus the peace that is in Christ Jesus!!