In today's message we look at the oldest Psalm in the Bible; Psalm 90.  We know it's the oldest because it was written by Moses. At the end of the wilderness wanderings, Moses prepares the new generation to enter the Land of Canaan.  Most of the Exodus generation passed away due to the sin at Kadesh-Barnea.  Joshua's generation needed to be reminded of God's covenant faithfulness and exhorted to "number their days."