Jamieson, Fausset and Brown on Psalms 102:23-28

23-28. The writer, speaking for the Church, finds encouragement in the midst of all his distresses. God's eternal existence is a pledge of faithfulness to His promises.

in the way--of providence.

weakened--literally, "afflicted," and made fearful of a premature end, a figure of the apprehensions of the Church, lest God might not perform His promise, drawn from those of a person in view of the dangers of early death (compare Psa 89:47). Paul (He 1:10) quotes Psa 102:26-28 as addressed to Christ in His divine nature. The scope of the Psalm, as already seen, so far from opposing, favors this view, especially by the sentiments of Psa 102:12-15 (compare Is 60:1). The association of the Messiah with a day of future glory to the Church was very intimate in the minds of Old Testament writers; and with correct views of His nature it is very consistent that He should be addressed as the Lord and Head of His Church, who would bring about that glorious future on which they ever dwelt with fond delightful anticipations.