It is surely frightening to think that God’s wrath will equal all the obedience that is due to Him. Although life is short and the wrath of God terrifying, the mercy and protection of God for His people are great. God is the home of His people: “Lord, you have been our dwelling place in all generations” (v. 1).
“Teach us to number our days that we may get a heart of wisdom.” (Psalm 90: 12)
This verse is often treated as if it were a proverb that means, “Life is short, so live wisely.” But in the context of the whole psalm, it means much more than that, as we will see. It is a key part of a meditation on God and on living as the people of God.
In Hebrew, verse 12 begins with the words “to number our days.” This phrase picks up the theme of time that is so pervasive in this psalm. A reflection on time leads us to see how weak we are and how short our lives are: “You return man to dust and say, ‘Return, O children of man!’ … You sweep them away as with a flood; they are like a dream, like grass that is renewed in the morning: in the morning it flourishes and is renewed; in the evening it fades and withers… 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, and we fly away” (vv. 3, 5–6, 10). Here, Psalm 90 shows its connection to the concerns of Psalm 89 about man’s frailty: “Remember how short my time is! For what vanity you have created all the children of man! What man can live and never see death? Who can deliver his soul from the power of Sheol?” (Ps. 89:47–48).