The Lord is my Rock; or, my Cliff—my Sela'—an expression used commonly of Petra. And my Fortress (comp. Psalms 144:2). Not only a natural stronghold, but one made additionally strong by art. And my Deliverer.
A living Protector, not a mere inanimate defence. My God, my Strength; rather, my Rock, as the same word (tsur) is translated in Exodus 17:6; Exodus 33:21, Exodus 33:22; Deuteronomy 32:4, Deuteronomy 32:15, Deuteronomy 32:18, Deuteronomy 32:31; 1 Samuel 2:2; 2 Samuel 23:3; Isaiah 26:4.
It is the word from which the strong city, Tyro, derived its. name. In whom I will trust (comp. Dent. 32:37). My Buckler (comp. Genesis 15:1, where God announced himself as Abraham's "Shield;" and see also Deuteronomy 33:29; Psalms 3:2; Psalms 5:12; Psalms 84:11; Psalms 119:114; Psalms 144:2).
The Horn also of my salvation (comp. Luke 1:69). The horn is the emblem at once of strength and of dignity. A "horn of salvation" is a source of excellency and might, whence "salvation'' or deliverance comes to those who trust in it.
And my high Tower (comp. Psalms 9:9, with the comment ad loc.). It is remarked that God, in this passage, receives seven epithets, "the mystic number which in sacred things symbolizes perfection" (Delitzsch).