The earth takes roughly 24 hours to rotate on its axis. And the earth takes roughly 365 days to circle the sun. These facts are constant and unchanging (as it is with time). You cannot store up time for later. And when you kill time, it doesn't come back from the dead. In Psalm 90, we have a Psalm of lament - from of all people - Moses, "the" man of God. So what can Moses tell us about how to live life well? And what does Moses know about God and how God works - in our lives - that is reason to hope?