Biblical Text: Luke 15:1-10
These are both parables of prodigal grace and repentance. Dogmatically this is one of those areas where you are forced to nod your head yes to a couple of things in contradiction. It is all grace. The shepherd calls and carries home. If so, then why repent? State of grace, oh happy condition, sin as a please and still have remission. But it is grace. Repentance is the first step of the Kingdom. If that is the case, then why do I need grace? I just do the work of repentance. But that requires grace. Aquinas had it all worked out. Unfortunately Aquinas was out of favor intellectually when Luther came around. But that is neither here nor there.
My take is that these texts set in their context are suppose to be funny. They are absurd in a way that illuminates both our lost condition and the prodigal nature of grace. You have to get the joke, you have to accept the premise of grace, for the rest to make sense. But once you accept he premise it is one of those “oh, crap” moments. I was lost, but now I’m found. Grace comes with a hidden imperative. Home is that way. Go joyfully.