What happened at Shawshank .
If you want your laundry back from the Chinese laundry, you must give the clerk a ticket in order to redeem your goods.
In Christianity, a few magic words are your ticket no matter how horrible a life you lived or how many you tortured, maimed, or raped.
Redemption means to atone for a fault. It means to do something to deliver you from a state of guilt. It means to rescue you.
Mankind disobeyed God in the Garden of Eden. They ate the apple he told them never to eat. Suddenly mankind was now separated from God because they disobeyed and went against him. From this point forward all humans were born with a sin nature. You can't go to heaven and dwell with God when you have a sin nature. So God sent Jesus Christ to redeem us.
Here's a little background: God has always demanded that a price be paid for going against him. All throughout the Old Testament, a price had to be paid when people sinned. They had to sacrifice lambs, etc. after they sinned so that they could be reconciled to God again. But it was just a temporary reconciliation until the next time humans sinned.
In the New Testament, God sent the Savior to pay the price (dying on the cross) once and for all so that whoever believes in Him would be permanently forgiven. No more need to sacrifice an animal every time you sinned. That is why Jesus is called the Lamb of God. God knew that there needed to be an enormous sacrifice that would last for all of eternity if humans were going to be permanently forgiven. Jesus Chist is the only being who could make a sacrifice big enough and eternal. The sacrifice is big enough because he is the Son of God. You can't get any bigger than that. Jesus is also eternal. This means that his sacrifice is eternal.
All who believe that he is the son of God and that he made this sacrifice and that God raised him to life after his death, will be forgiven and redeemed. They can now dwell with God for eternity. They are permanently forgiven instead of temporarily forgiven. Does that make sense?
Act of redeeming or atoning for a mistake!
Redemption: The action of saving or being saved from sin, error, or evil.