Yet is their strength... — The LXX. (and so Vulg.) appear to have had a slightly different reading, which gives much better sense: “Yet their additional years are but labour and sorrow.” The old man has no reason to congratulate himself on passing the ordinary limit, of life.
For it is soon cut off. — This seems hardly to give, as it professes to do, a reason for the fact that the prolongation of life beyond its ordinary limit brings trouble and sorrow, and we are compelled to see if the words can convey a different meaning. Literally the clause is, for (or thus) passeth haste, and we fly away (like a bird), which may be rendered, thus there comes a haste that we may fly away; i.e., even though we may have prayed for an extension of life, it brings with it such weariness that we long at last to escape — a fact sufficiently true to experience.
“Yet are these feet, whose strengthless stay is numb,
Unable to support this lump of clay,
Swift winged with desire to get a grave.”
SHAKSPEARE.