Psalm 90

Toil and trouble; that's how Moses described the events of our lives. I wonder how old Moses was when he penned this psalm? Did he compose these words as he prepared to climb the mountain to die? Or was this composition from his "early" years of leading the people of Israel. Was he in his 80's or older? He understood the contrast between God's eternal spirit and our mortal selves. I think that he presents the difference here in order to also show us God's power. That is one truth we need to fully grasp as we grow in our lives of faith. 
It took me about 2 minutes to read this psalm.
Stuart