This is the heart of what it should mean to be a Christian of any designation; the desire to continue to move and grow and learn and change, even if those things place us in opposition to the person we once were or the beliefs we once held firmly or the testimony we once gave. As we move through space and time, our faith should be in continual evolution. We should always look back at the previous version of ourselves and realise how much we didn’t know then. We should be able to see how far we’ve come in matters of spirituality.

This is intended by Jesus to catch us off guard.  Even the characters in the parable itself are surprised by how the final judgement was actually playing out.  This, as with many of the parables, is meant as a warning to those of us who think we have it all sewn up.