The Fourth Sunday of Advent celebrates that God keeps the promise made to David to give him an everlasting throne. The angel tells Mary that God will give David’s throne to her son Jesus. She is perplexed by Gabriel’s greeting and by the news of her coming pregnancy, but she is able still to say, “Count me in.” We who know that Jesus is called king only as he is executed still find it a mystery hard to fathom, but with Mary today we hear the news of what God is up to and say, “Count us in.”