Commentaries:
Jamieson, Fausset, and Brown
The various terms used describe God as an object of the most implicit and reliable trust.
rock—literally, "a cleft rock," for concealment.
strength—a firm, immovable rock.
horn of my salvation—The horn, as the means of attack or defense of some of the strongest animals, is a frequent emblem of power or strength efficiently exercised (compare Deuteronomy 33:17; Luke 1:69).
tower—literally, "high place," beyond reach of danger.
Other Jamieson, Fausset, and Brown entries containing Psalms 18:2:
Psalms 28:1
Psalms 31:2-4
Psalms 46:1
Psalms 61:2
Psalms 62:2
Psalms 71:3
Psalms 73:26
Psalms 91:14-16
Psalms 94:22-23
Proverbs 18:10
Luke 1:69
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