The Bible tells us that Psalm 90 is a prayer written by Moses the man of God, making it the 1st Psalm and the oldest datable Psalm. The main messages of Psalm 90, is that God is eternal, we are not, and it would be wise for us to know how to react to that reality. The Psalms main advice come in verse 12' in the New Century Version (NCV) it says " Teach us how short our lives really are so that we may be wise". The focus of the sermon is that we should consider each day a gift from God. Kind of still working through it , but the bottom line is "Time Matters"