Many of our assumptions about the way life is and how the world works need to be cross-examined and corrected. Once his work on earth was complete, Jesus sent his Holy Spirit to do just that—to be his expert witness to expose our false assumptions and set the record straight. This week we see that the assumptions in need of correction are ones we have about ourselves. When sinners encounter their triune God, who is the very essence of holiness, we rightly realize that we are unclean. Nevertheless, this same triune God works to convince us that we have been cleansed. The Father has sent his Son to make atonement for our sin and his Spirit speaks to our hearts to convince use we are God’s children.