Unrighteous sinfulness and Sinful righteousness

An oft-repeated scene in the New Testament- Jesus is sitting down to dinner with an assorted group of people and He insists on hanging out with those tax collectors and sinners.... The Pharisees and scribes bust in with grumbling asking Jesus and His disciples why they keep doing this. In Luke 5:31-32, Jesus tells us His reasoning- "And Jesus answered them, 'Those who are well have no need of a physician, but those who are sick. I have not come to call the righteous but sinners to repentance." (See also what Jesus said in Matthew 21:31)
      This is precisely the point Jesus was trying to get across with His parables in Luke 15- The Parable of the Lost Sheep, the Parable of the Lost Coin and The Parable of the Lost Son. (Also known as The Parable of the Prodigal Son). That parable would be better called The Parable of the Lost Sons, for both the younger and elder brother were lost and needed Father's forgiveness.
      And the Good News is that God our Father offers us absolution absolutely free- before we do anything. He gives us amazing love and grace for free. It's there for the taking. To be sure, the repentance follows afterwards- but it never precedes the accepting of God's hand-out of amazing grace. But the two brothers had two different things to repent of in the parable.
The younger son needs to repent of his unrighteous sinfulness and the elder son needs to repent of his sinful righteousness. (Isaiah 64:6, Romans 3:10-11, Ecclesiastes 7:20, Romans 3:23, Romans 6:23, Romans 5:8, Romans 10:9-13)

(* I would be extremely remiss if I didn't acknowledge Rev. Tim Keller and his book "The Prodigal God" for informing and inspiring these observations. This post is largely the crux of his book. Do yourself a favour and go read it! :-))