91:1 dwelleth. Although the 91st psalm does not have a specifically named author, it is possible that it was written by Moses as a supplement to his previous psalm, Psalm 90. Both begin with the theme of God as the dwelling place of the believer, and have various other points of commonality in viewpoint. Both psalms are most easily understood in terms of the wanderings, hardships, and enemies of the Israelites during their forty years in the wilderness.
91:1 most High. The two names of God in this verse—“most High” (Hebrew Elyon) and “Almighty” (Shaddai)—suggest that God is both “over all” and “under all,” thereby surrounding us, able both to provide and protect.