The Lord liveth - Yahweh - the name used here - is often described as the living God in contradistinction to idols, who are represented as without life, Deuteronomy 5:26; Joshua 3:10; 2 Kings 19:4; Psalm 42:2; Matthew 16:16; 1 Thessalonians 1:9. Compare Psalm 115:5; Psalm 135:16. It is probably in allusion to this idea that the phrase "The Lord liveth" is used here. It is a joyful exclamation in view of all that God had done; of all the deliverances which he had performed for the author of the psalm. In the remembrance of all this the psalmist says that God had shown himself to be the living, that is, the true God. These interpositions furnished abundant demonstration that Yahweh existed, and that he was worthy of adoration and praise as the true God. So, in view of mercy and salvation, the heart of the redeemed exultingly exclaims, "The Lord lives - there is a living God."

And blessed be my Rock - God, who has shown himself to be a refuge and a protector. See the note at Psalm 18:2.

And let the God of my salvation be exalted - The God who has saved me from my enemies. Let him be exalted, be praised, be honored, be adored. Let his name be exalted above all idol gods; above all the creatures that he has made. The wish is, that His name might be made prominent; that all creatures might praise and honor Him.

Psalm 18:46 Parallel Commentaries

The King --Continued.
In our last chapter we have seen that the key-note of "The Songs of the King" may be said to be struck in Psalm xviii. Its complete analysis would carry us far beyond our limits. We can but glance at some of the more prominent points of the psalm. The first clause strikes the key-note. "I love Thee, O Jehovah, my strength." That personal attachment to God, which is so characteristic of David's religion, can no longer be pent up in silence, but gushes forth like some imprisoned stream, broad and full …
Alexander Maclaren—The Life of David

In the Present Crusade against the Bible and the Faith of Christian Men...
IN the present crusade against the Bible and the Faith of Christian men, the task of destroying confidence in the first chapter of Genesis has been undertaken by Mr. C. W. Goodwin, M.A. He requires us to "regard it as the speculation of some Hebrew Descartes or Newton, promulgated in all good faith as the best and most probable account that could be then given of God's Universe." (p. 252.) Mr. Goodwin remarks with scorn, that "we are asked to believe that a vision of Creation was presented to him …
John William Burgon—Inspiration and Interpretation

Twenty-Third Lesson Bear Fruit, that the Father May Give what Ye Ask;'
Bear fruit, that the Father may give what ye ask;' Or, Obedience the Path to Power in Prayer. Ye did not choose me, but I chose you, and appointed you, that ye should go and bear fruit, and that your fruit should abide: that whatsoever ye shall ask the Father in my name, He may give it you.'--John xv. 16. The fervent effectual prayer of a righteous man availeth much.'--James. v. 16. THE promise of the Father's giving whatsoever we ask is here once again renewed, in such a connection as …
Andrew Murray—With Christ in the School of Prayer