But thou art the same, and thy years shall have no end.
Time cannot apply to God. C.S. Lewis gave us an illustration which I’d like to pass on to you. If you can, think of eternity, of infinitude, as a pure white sheet of paper extending infinitely in all directions. Then think about a man taking a pencil and drawing a line, one inch long, on that infinitely extended sheet of paper. And that little line is time. It begins and it moves an inch and ends. It begins on the paper and it ends on the paper. So time began in God and will end in God. And it doesn’t affect God at all. God dwells in an everlasting now….
You and I are creatures of time and change. It is in “now” and “was” and “will be” and “yesterday” and “today” and “tomorrow” that we live. That’s why we get nervous breakdowns, because we’re always just one jump ahead of the clock. We get up in the morning, look at the clock and let out a gasp of dismay. We rush for the bathroom, brush our teeth, tear downstairs for breakfast, eat a half-cooked egg and rush out to catch the commuter bus. That’s time, you see—time is after us! But God Almighty sits in His eternal now. And all the time that ever was is only a tiny mark upon the infinitely extended bosom of eternity. AOGII058
No beginning, no ending, no time limitations, no start, no finish…. I am so small, Lord, and yet You care for me. Thank You, Loving Father. Amen. 
27 In contrast to all created existence, the Lord “remains the same” (cf. Heb 13:8). He is the “first and last” (Dt 32:39; Isa 41:4; 46:4; 48:12). The phrase “but you” is an emphatic contrast to “they” (v. 26), i.e., all created existence (v. 25). He remains the same and undergoes no change over the “years” (cf. v. 24). He is the Creator (v. 25; cf. Heb 1:10–12), who remains forever.
 Tozer, A. W., & Eggert, R. (2015). Tozer on the almighty god: a 365-day devotional. Chicago, IL: Moody Publishers.
 VanGemeren, W. A. (2008). Psalms. In T. Longman III & D. E. Garland (Eds.), The Expositor’s Bible Commentary: Psalms (Revised Edition) (Vol. 5, p. 754). Grand Rapids, MI: Zondervan.