33:26–29. Jeshurun (lit., “the upright one“; cf. v. 5; 32:15) was a name for Israel. The nation’s God is incomparable in power as the One who rides on the heavens and the clouds (33:26). No matter what adversity Israel would encounter, the LORD could be there instantly with power to deliver her. Because God is eternal and is a Refuge for His people, His everlasting arms, figuratively speaking, would protect Israel in times of calamity, and would destroy her enemy (v. 27). Having such a wonderful and powerful God the nation could be assured of conquering Canaan and then of living for a while in safety and prosperity (v. 28). If Israel would only serve her incomparable God she would be an incomparable people (O Israel! Who is like you.…?) in blessing (saved and shielded by God) and invincible before her enemies (v. 29).
Jack S. Deere, “Deuteronomy,” in The Bible Knowledge Commentary: An Exposition of the Scriptures, ed. J. F. Walvoord and R. B. Zuck, vol. 1 (Wheaton, IL: Victor Books, 1985), 322.