Many believe that this Psalm was written by Moses after the failure at Kadesh-barnea. Knowing that everyone 20 years and older would not see God‘s promise because of unbelief, God led Moses to share his introspection so that they and we might gain some perspective.
1. Make each day matter.
Ps. 90:1-4 “Lord, thou hast been our dwelling place in all generations.
Before the mountains were brought forth, or ever thou hadst formed the earth and the world, even from everlasting to everlasting, thou art God.
Thou turnest man to destruction;
and sayest, Return, ye children of men.
For a thousand years in thy sight
are but as yesterday when it is past,
and as a watch in the night.
2. God sees all, so we must be wise. There are no “do overs”.
V8, 11-12 “Thou hast set our iniquities before thee, our secret sins in the light of thy countenance.
Who knoweth the power of thine anger? even according to thy fear, so is thy wrath we.
So teach us to number our days,
that we may apply our hearts unto wisdom.”
3. Joy is a choice in good times and in bad.
V14-15 “O satisfy us early with thy mercy; that we may rejoice and be glad all our days.
Make us glad according to the days wherein thou hast afflicted us, and the years wherein we have seen evil.”
LESSON - Time is not the same to an eternal God as it is to us who are finite beings. We must make today count for eternity because yesterday is gone, tomorrow in this life is not promised, and the call to return to the Lord has gone out. Without knowing the time that remains, we must make wise decisions with the time we have and avoid sin at all costs. Even during bad times, we can experience REAL joy because it is He who makes us glad, not our circumstances. If we choose not to experience joy for today regardless of our circumstances, it is because we have taken our eyes off of that which is eternal and focused only on the temporal. Even if times are bad, according to v17 you can still have joy “And let the beauty of the LORD our God be upon us”