We're splitting this chapter up unfairly, as the three stories go together as a unit. Like any good joke about a lawyer, a doctor, and a minister, the punch line always develops off the third facet of the story. Jesus makes his main point in the story of the two sons after setting things up in the first two.
So what does Jesus set up in these ten verses, in stories of a lost sheep and a lost coin? The stories focus, of course, on the searching and the searcher and especially on the heart of the searcher. We may often miss Jesus' groundwork here: The shepherd lays the sheep on his shoulders "rejoicing." He calls his friends together and enjoins them to "Rejoice with me." And Jesus emphasizes that there is "joy in heaven." Similarly, the woman who finds her coin after a diligent search calls her friends and neighbors together and says, "Rejoice with me." And Jesus repeats that there is "joy in heaven" over a sinner who repents.
Can we miss the fact that God is joyful, and that his friends rejoice with him? Remember the context. Jesus is telling these stories while he's consorting with sinners, and the religious leadership is looking down their noses at the proceedings. Even before Jesus gets to his main point in the third example, it's clear that he's saying these religious leaders are not true friends of a rejoicing God. Their condemnation of these sinners means that they have mistaken the heart of God, or that they simply don't care about it. Their own standards of piety and performance exclude these sinful people -- and that's what matters. There is no joy in their carefully structured moralism.
Do you know the joyful heart of God? We so often bring baggage of our own -- performance anxiety, perfectionism, wounds from overbearing parents, discouragement from unrealistic standards we apply to ourselves -- and we project these things on to God, so we feel unacceptable. But this is not the heart of God. God is not looking at you and wishing you'd get your act together. If you are coming to him eager for fellowship, he is joyful. He rejoices. This is a God who throws a party when you come close to him!
We have to check ourselves, especially those of us who have been following Jesus for a long time. We have to check ourselves to make sure we are not aligning ourselves with the judgmental religious leaders, looking out at the world with an evaluative, condemning eye.