Must See! Keller's sermon 'Prodigal God' on Youtube

“Mercy and forgiveness must be free and unmerited to the wrongdoer. If the wrongdoer has to do something to merit it, then it isn't mercy, but forgiveness always comes at a cost to the one granting the forgiveness.” Timothy Keller, The Prodigal God: Recovering the Heart of the Christian Faith

"But the father said to his servants, 'Bring quickly the best robe, and put it on him, and put a ring on his hand, and shoes on his feet. And bring the fattened calf and kill it, and let us eat and celebrate.'" Luke 15:22-23 

Watch video message by Tim Keller on Youtube Prodigal God DVD The Parable of the Prodigal Son

Also read Tim Keller's The Prodigal God: Rethinking a father's love