For some months now I’ve been corresponding with a young man who is thinking deeply about faith. On one occasion he wrote, “We’re no more than teeny, tiny, infinitesimal blips on the timeline of history. Do we matter?”

Moses, Israel’s prophet, would agree: “Our days . . . quickly pass, and we fly away” (Psalm 90:10). The brevity of life can worry us and cause us to wonder if we matter.

We do. We matter because we are deeply, eternally loved by the God who made us. In this poem Moses prays, “Satisfy us . . . with your unfailing love” (v.…