Good News: I Don't Have to Prove Myself

In a very famous parable of Jesus in Luke 15 of "the lost son" (or "the prodigal"), we see the results of two sons that both are trying to prove themselves and turn away from their loving Father.  But as that fails, one son returns to the Father and the other rejects the Father.  Both receive prodigal grace and don't need to prove themselves to him.