Jesus reveals to us today the joy in heaven over the repentance of a sinner. He employs the imagery of a shepherd who has a hundred sheep. One of them gets lost. He describes the shepherd leaving the 99, in search of the lost one. What joy he has when he finds it. The same thing happens in the realm of God and man. We are the sheep and each of us experiences being lost somehow and sometimes. The gratifying revelation Jesus makes is that God searches for you all the time, just like that shepherd. When He finds us to return to the fold, He is very happy, in the same analogous manner as the shepherd finding the lost sheep.