One would hope people would see the folly in this. Christ died for all sins and we are reconciled to Him when we accepted Him. We belong to God. We don't do things to earn "good behavior" nor are we reconciled over and over to Him. He knows what we are when He saved us and He is at work in us to mold us into what we are becoming.
Your comment: “One would hope people would see the folly in this. Christ died for all sins and we are reconciled to Him when we accepted Him.”
So are you saying that when someone accepts God, then they do not commit sins after that time and thus there is no need to forgive these sins? How does one go from being a sinner to not being a sinner? Hoe does one achieve perfection in the eyes of the Lord?
Why did Jesus tell the apostles, “‘As the Father has sent me, even so I send you.’ And when he had said this, he breathed on them, and said to them, ‘Receive the Holy Spirit. If you forgive the sins of any, they are forgiven; if you retain the sins of any, they are retained’” (John 20:21–23)? (This is one of only two times we are told that God breathed on man, the other being in Genesis 2:7, when he made man a living soul. It emphasizes how important the establishment of the sacrament of penance was.)
Please explain the following: “If God has already forgiven all of a man’s sins, or will forgive them all (past and future) upon a single act of repentance, then it makes little sense to tell the apostles they have been given the power to “retain” sins, since forgiveness would be all-or-nothing and nothing could be “retained.”