First, from Mary Luti, “You Do Not Answer“:
There’s an old slogan that says, ‘If God feels far away, guess who moved?’ You’re supposed to answer, ‘Not God.’ But whoever thought that up never read the psalms. Jesus, who probably loved saying “Surely goodness and kindness will follow me all the days of my life” as much as we do, didn’t pray Psalm 23 on the cross. He prayed Psalm 22: “I cry to you, but you do not answer.”
Psalm 90 is a reflection on the transience and brevity of life, our mortality in the face of God’s eternity. In Isaac Watts’ famous hymn based on the psalm he captures this beautifully in this verse:
Time, like an ever rolling stream,
Bears all its sons away;
They fly, forgotten, as a dream
Dies at the opening day.
The fact is we only get so many days. In the face of this reality the psalmist prays to God: “Teach us to count our days, that we may gain a wise heart.”