|Matthew Henry's Concise Commentary|
102:23-28 Bodily distempers soon weaken our strength, then what can we expect but that our months should be cut off in the midst; and what should we do but provide accordingly? We must own God's hand in it; and must reconcile this to his love, for often those that have used their strength well, have it weakened; and those who, as we think, can very ill be spared, have their days shortened. It is very comfortable, in reference to all the changes and dangers of the church, to remember that Jesus Christ is the same yesterday, to-day, and for ever. And in reference to the death of our bodies, and the removal of friends, to remember that God is an everlasting God. Do not let us overlook the assurance this psalm contains of a happy end to all the believer's trials. Though all things are changing, dying, perishing, like a vesture folding up and hastening to decay, yet Jesus lives, and thus all is secure, for he hath said, Because I live ye shall live also.
Verse 27. - But thou art the same; literally, but thou art HE (comp. Isaiah 44:4; Isaiah 46:4); i.e. "thou art the one eternal and unchangeable existence - the one reality." And thy years shall have no end. It is by an accommodation to human modes of thought that God's "years" are spoken cf. An eternal existence is a unity - not made up of years and days.
Gill's Exposition of the Entire Bible
But thou art the same,.... That hast created them, as the Targum adds; or "thou art he" (h), the everlasting I AM, the unchangeable Jehovah; immutable in his nature and perfections; in his love and affections to his people; in his power to protect and keep them; in his wisdom to guide and direct them; in his righteousness to clothe them, and render them acceptable to God; in his blood to cleanse them, and speak peace and pardon to them; in his fulness to supply them, and in his intercession for them,
and thy years shall have no end; See Gill on Psalm 102:24, now he, that made the heavens and the earth, and will be when they will not be, especially in the present form they are, must be able to rebuild his Zion, and bring on the glory he has promised; and from his eternity and immutability may be concluded the continuance of his church and interest in the world, until all the glorious things spoken of it shall be fulfilled, as follows.
(h) "tu ipse", Pagninus, Montanus.
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