For thus saith the high and lofty One that inhabiteth eternity, whose name is Holy; I dwell in the high and holy place, with him also that is of a contrite and humble spirit, to revive the spirit of the humble, and to revive the heart of the contrite ones.
If I thought that the word “eternal” as referring to God meant only “lasting until the end of the age,” I’d just fold my Bible up and go home and wait for the end. If I had a God that only lasted so long, that didn’t have eternity in His heart, I couldn’t possibly find it worthwhile to preach….
The Old Testament Hebrew has exhausted itself—wrung its language as you wring a towel, to get the last drop of meaning out of it—to say that God is forever and ever endlessly, unto perpetuity, world without end. The New Testament Greek has done the same. There aren’t any other words in the Greek language that can be used to mean “unto perpetuity, having no end, going on and on and on and on endlessly and forever.”…
Eternal, everlasting, forever, unto perpetuity, world without end—all of those words mean just what they say. When God talks about Himself, that’s what He means—the High and Lofty One who exists eternally, forever, unto perpetuity, world without end. AOGII053-055
Lord, I bow today before the high and lofty One who far surpasses my comprehension. Holy is the Lord! Amen. 
57:15 high and lifted up. See note on 6:1; cf. 52:13. God dwells in the high and holy place of his eternal transcendence, where no one else may go, and also dwells with him who is of a contrite and lowly spirit.
57:15 the high and lofty one Echoes the vision of God in 6:1, and the exaltation of the Servant in 52:13.
57:15 high and lifted up. An epithet for the Lord (6:1).
high and holy place. The Lord is transcendent over creation, yet He is nonetheless not far from those who call on His name.
contrite and lowly spirit. Those who submit to God’s law and repent under His judgment (Pss. 34:17, 18; 51:17; 1 Pet. 5:6).
 Tozer, A. W., & Eggert, R. (2015). Tozer on the almighty god: a 365-day devotional. Chicago, IL: Moody Publishers.
 Crossway Bibles. (2008). The ESV Study Bible (p. 1345). Wheaton, IL: Crossway Bibles.
 Barry, J. D., Mangum, D., Brown, D. R., Heiser, M. S., Custis, M., Ritzema, E., … Bomar, D. (2012, 2016). Faithlife Study Bible (Is 57:15). Bellingham, WA: Lexham Press.
 Sproul, R. C. (Ed.). (2015). The Reformation Study Bible: English Standard Version (2015 Edition) (p. 1232). Orlando, FL: Reformation Trust.