Redemption is usually seen as a doctrinal subject referring to Christ’s payment on the cross for our sins. Redemption includes that but God redeems a whole lot more than that.
God redeems some sin as well. Here are a few examples:
1) The curse on the earth caused death. Death can be beautiful in creation. Fall colors, dead trees can look cool, not to mention that death provides fertilizer to create life.
2) Abram had a bunch of stuff when he parted company with Lot. A good portion of the stuff Abram had was given to him by Pharaoh when Abram lied about Sara!
3) David’s sin with Bathsheba lead to the birth of Solomon, the wisest man ever.
There are other examples as well. None of these things excuse sin. Fall colors do not make up for Adam’s sin, lies are not OK as long as you get stuff to use for God, and good kids do not eliminate adultery.
But it’s still cool how God can use our idiocy to create something good. Ultimate example:
4) A bunch of guys crucified the Son of God and it worked out to our eternal redemption.
It doesn’t get any better than that! It also does not excuse the guys who crucified Christ. Woe to him who took part in that. Imagine what good God could do with all good!? That will be the believer’s eternity.