BIBLE VERSE STUDY
Psalms 90:12 — Numbering Our Days for a Wise Heart
Moses asks God to teach His people to count their days so that they may gain a heart of wisdom.
Scripture
12So teach us to number our days, That we may get us a heart of wisdom.
What this passage means
Psalms 90:12 is structured as a petition to God framed by a stated purpose clause introduced by "that" ("That we may get us a heart of wisdom"). The verb "teach" implies that counting time correctly is not something people master on their own; it requires divine instruction. The phrase "number our days" presents lifespan not as a quantity to be maximized but as a moral inventory to be tallied, with the goal of acquiring "a heart of wisdom."
The contrast built into the surrounding lines explains why this petition is necessary. Verses 9–10 describe human life as swept away in wrath, capped at "threescore years and ten" (seventy) or, with strength, "fourscore" (eighty), characterized as "labor and sorrow" before vanishing. Verse 11 then asks who truly knows the weight of God's anger. Within that framing, verse 12 is the turn from despair to prayer: because life is short and divine judgment is weighty, only God can give the perspective needed to live wisely.
The "heart of wisdom" in the second line is the Hebrew parallelism's positive counterpart to numbering days. Counting days without wisdom produces only dread; wisdom converts the count into a lived orientation toward God. The verse thus pairs a request for accurate perception of time with a request for an inner disposition that uses that perception rightly.
Context
Psalm 90 is attributed to Moses and opens by declaring God the dwelling place of His people "in all generations" (v. 1) and the One who is God "from everlasting to everlasting" (v. 2). It then sets human life against that backdrop: humans return to dust (v. 3), a thousand years are like a watch in the night to God (v. 4), and life is compared to grass that flourishes in the morning and withers by evening (vv. 5–6).
Verses 7–11 trace the consequence: humanity is consumed by God's anger (v. 7), secret sins are exposed before His presence (v. 8), days pass away in wrath (v. 9), the span of life is seventy or eighty years of labor and sorrow (v. 10), and few truly grasp the power of His anger (v. 11). Verse 12 sits at the hinge of the psalm, turning the meditation on mortality into the petition to be taught to number days wisely, after which verses 13–17 ask God to return, satisfy His people with lovingkindness, and establish the work of their hands.
Common questions
Who is the speaker of Psalms 90:12?
The psalm is titled "A Prayer of Moses the man of God" (v. 1). The petition in verse 12 is therefore voiced collectively by Moses and the community of God's people, asking that God Himself teach them to number their days.
What does it mean to "number our days"?
In the context of verses 9–11, where life is depicted as seventy or eighty years of labor and sorrow that quickly passes away, numbering one's days means honestly reckoning how brief life is, rather than expanding the years themselves. The verse makes clear that the purpose of this reckoning is inward: "that we may get us a heart of wisdom."
Why is the petition directed to God rather than to the people themselves?
The verb "teach" frames the request as divine instruction. Because human days are consumed in wrath and few grasp the power of God's anger (vv. 7–11), accurate perception of time and the wisdom that comes from it are treated as gifts only God can grant, which is why verse 12 asks Him to give what people cannot generate on their own.