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 focus on that important role the Holy Spirit plays as we celebrate the Day of Pentecost. Though Jesus’ visible departure from this earth might seem like a source of grief, it actually serves for our good. Jesus’ completed work on our behalf is the sum and substance of the Holy Spirit’s testimony through his Word during earth’s last days.