What a testimony given by David to his God! In this single verse, there is a sevenfold ascription of praise to the Lord for His great salvation. Each testimony can be appropriated also by all who trust Him.
1. My Rock: The word used here does not mean a stone or even a boulder, but a mighty monolith, immovable and impregnable.
2. My Fortress: This word refers to a great bulwark--a stronghold. The Hebrew word is essentially the same as Masada, the high butte where the Jews resisted the Roman armies after the destruction of Jerusalem.
3. My Deliverer: "Our God is able to deliver," even from the fiery furnace, the den of lions, and from the armies of Saul.
4. My Strength: This is another word often translated "rock," this time a rugged, craggy one, most appropriate as a symbol of great strength.
5. My Buckler: The small, movable shield used to "quench all the fiery darts of the wicked" (Ephesians 6:16).
6. The Horn of Salvation: This striking Old Testament symbol is even repeated in the New Testament (Luke 1:69) and applied to the coming Savior, referring either to the "horns of the altar" where fleeing sinners could cling for refuge, or to the fighting horns of a strong beast.
7. My High Tower: Here the word is not for a man-made tower, but for a natural, high, topographic eminence, suitable both for watching and for defense.
The great promises of salvation and security in Christ are timeless. The words that brought such hope to David are still a comfort to believers today. He is still "the God of all grace" (1 Peter 5:10) to all who trust Him. HMM http://www.icr.org/article/6000/