Shared ground
These verses hold together two realities: human life can feel abruptly cut short, and God’s life is not limited. The speaker says his strength has been weakened and his days shortened, then asks “my God” not to be taken away mid‑life (explicit claims). The reason given is a contrast in time: human “days” are fragile, but God’s “years” run through “all generations” (explicit claims).
The psalm then frames God’s permanence in relation to creation. God founded the earth and made the heavens (explicit claims). Yet the created order is pictured as something that can wear out and be changed, while God endures and remains “the same,” with years that have no end (explicit claims). The final line draws a community conclusion: the children of God’s servants will continue and be established before God (explicit claim), grounding hope beyond one person’s lifespan.
Where interpretation differs
1) “He weakened my strength” — God’s direct action or the speaker’s attribution.
Some read v.23 as the speaker saying God actively caused the weakening and shortening of life. Others hear it as the speaker speaking from within suffering, attributing what has happened to God without trying to map out direct causation.
2) What happens to “heavens and earth.”
Some take “they will perish” and “you will change them like a cloak” as describing the eventual end of the current creation followed by a renewed state. Others read it more as poetic language for creation’s instability compared to God’s stability, without specifying the mechanism or timeline.
3) Who are “the children of your servants.”
Some take this as a broad statement about Israel’s continuing life as a people. Others read it as focusing on the faithful within the community (“your servants”) and their descendants.
Why the disagreement exists
The passage speaks in poetry, which compresses big claims into image-rich lines. In v.23, the grammar allows a straightforward “God did this,” but the psalm’s lament setting also allows for the way sufferers talk to God with bluntness. In vv.25–26, “perish,” “wear out,” and “change” are vivid metaphors, and readers differ on how directly those metaphors describe future cosmic events. In v.28, “servants” can be heard either as a title for the whole covenant community or as a narrower description of those who remain loyal.
What this passage clearly contributes
This text gives a sharp theology of time and permanence: humans experience life as vulnerable “days,” while God’s “years” stretch across every generation. It also presents God as creator (earth’s foundation; heavens made by God) and as unchanged by the aging and alteration that marks creation. Finally, it ties God’s unchanging life to the continuing existence of God’s people across generations, so the horizon of hope is bigger than one individual lifespan (see also Psalm 90:1–4).