The LORD is my rock, and my fortress, and my deliverer; my God, my strength, in whom I will trust; my buckler, and the horn of my salvation, and my high tower.
My God, my strength - Hebrew, 'my strong rock' х tsuwriy (H6697)], expressing immovable firmness: implying the immutable faithfulness of God. Compare Psalms 31:1-24, derived from Deuteronomy 32:4. See Genesis 49:24; Isaiah 26:4, margin, in 2 Samuel 22:3; 2 Samuel 22:47, 'my rock-God.' Distinct from "my strength" (Psalms 18:1) х chizqiy (H2391)] and my rock, implying height and inaccessibility х calª`iy (H5553)] (Psalms 18:2). The natural state of Palestine, abounding in rocks, which David often betook himself to when fleeing from Saul, suggested the figure.
The horn of my salvation - His power affords me defense, just as the beast whose chief strength lies in its horns depends on them for safety from its foes.