Psalm 90 was written by Moses, begins the 4th book of Psalms. He reminds us about the eternal existence of God, “before the mountains were brought forth, or ever you had formed the earth and the world, from everlasting to everlasting you are God… a thousand years in your sight are but as yesterday when it is past”. By contrast our lives are short, “you return man to dust… the years of our life are seventy, or even by reason of strength eighty; yet their span is but toil and trouble; they are soon gone”.
The reason for this contrast becomes apparent. “Teach us to number our days that we may get a heart of wisdom… make us glad for as many days as you have afflicted us”. We only have a short life in contrast to God’s eternity, but it is up to us to make the most of it, learn from God’s wisdom and develop our relationship with Him. “Satisfy us in the morning with your steadfast love, that we may rejoice and be glad all our days.”
Psalm 91 continues the theme. “He who dwells in the shelter of the Most High will abide in the shadow of the Almighty. I will say to the Lord, My refuge and my fortress, my God, in whom I trust”.