I will greatly rejoice in the LORD, my soul shall be joyful in my God; for He hath clothed me with the garments of salvation, He hath covered me with the robe of righteousness -Isaiah 61:10

(W)e shall never grow weary of Christ. If we are His people, we shall never have any cause to part from Him; “I will rejoice in Thy salvation.” I could bring up to this platform an aged brother whom all of you would know, who has infirmities and has age creeping upon him, but there is not a happier soul in this house than he; and when I had made him speak to you, I could bring you many more aged women too, and I would ask them what they think of Christ, and I am sure they would say with greater emphasis than I can, “I will rejoice in Thy salvation.” I almost wish my grandfather were alive and behind me to-night, for on one occasion I preached with him in the pulpit, and when I came to speak of experience he pulled my coat-tail and came to the front, and said,”My grandson can tell you that he believes it, but I can tell you experimentally,” and on the old gentleman went with it. Well, many an aged Christian can tell you he has rejoiced in God’s salvation. He does rejoice, and, instead of age making the joy of his youth to become dim, it has mellowed and sweetened the fruit, which was sweet even at the first. Oh! that we may, when these hairs grow hoary with years, and the snows of many winters lie white upon our head, may we still rejoice in God’s salvation.

Millions of ages, throughout all the cycles of years that interpose ere Christ delivers up the kingdom to God, even the Father, and then onward, even through eternity, this always shall be our own ground of rejoicing, “I will rejoice in Thy salvation.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3503.cfm