He only is my rock ... - See the notes at Psalm 18:2.

I shall not be greatly moved - The word greatly here, or much - "I shall not be much moved," implies that he did not anticipate perfect security from danger or calamity; he did not suppose that he would escape all disaster or trouble, but he felt that no great evil would befall him, that his most important interests were safe, and that he would be ultimately secure. He would be restored to his home and his throne, and would be favored with future peace and tranquility. None of us can hope wholly to escape calamity in this life. It is enough if we can be assured that our great interests will be ultimately secured; that we shall be safe at last in the heavenly world. Having that confidence the soul may be, and should be, calm; and we need little apprehend what will occur in this world.

I shall not be greatly moved - Having God for my rock - strong fortified place, for my salvation - continual safety, and my defense - my elevated tower, which places me out of the reach of my enemies; I shall not be greatly moved - I may be shaken, but cannot be cast down.

He only is my Rock and my salvation,.... The Rock on which the church is built, and every believer; and which was David's safety, shelter, and shade, and which made him easy in his present state; and he was the author of his salvation, and the rock and strength of it, Psalm 95:1;

he is my defence; or refuge; see Psalm 9:9;

I shall not be greatly moved; or "with much motion", as Kimchi; or "with great motions", as Jarchi: he could not be moved off of the rock on which he was built; nor out of the city of refuge, whither he had betook himself for safety; and though he might be troubled in spirit, and shaken in mind, and staggered in his faith, and fall from some degree of steadfastness of it; yet not fall so as to be utterly cast down, or finally and totally, and so as to perish eternally. Aben Ezra interprets it, "shall not be moved" into the great deep; into the abyss or bottomless pit; and so some of the ancient Midrashes expound of "hell" (g); but much better is the Targum,

"I shall not be moved in a day of great affliction;''

see Acts 20:23.

(g) Vid. Jarchi & Yalkut Simeoni in loc.

{b} He only is my rock and my salvation; he is my defence; I shall not be greatly moved.

(b) It appears by the often repetition of this word, that the prophet endured many temptations by resting on God and by patience he overcame them all.

defence: Heb. high place

2. The titles applied to God often occur (Ps 9:9; 18:2).

be greatly moved-(Ps 10:6). No injury shall be permanent, though devised by enemies.

62:1-7 We are in the way both of duty and comfort, when our souls wait upon God; when we cheerfully give up ourselves, and all our affairs, to his will and wisdom; when we leave ourselves to all the ways of his providence, and patiently expect the event, with full satisfaction in his goodness. See the ground and reason of this dependence. By his grace he has supported me, and by his providence delivered me. He only can be my Rock and my salvation; creatures are nothing without him, therefore I will look above them to him. Trusting in God, the heart is fixed. If God be for us, we need not fear what man can do against us. David having put his confidence in God, foresees the overthrow of his enemies. We have found it good to wait upon the Lord, and should charge our souls to have such constant dependence upon him, as may make us always easy. If God will save my soul, I may well leave every thing else to his disposal, knowing all shall turn to my salvation. And as David's faith in God advances to an unshaken stedfastness, so his joy in God improves into a holy triumph. Meditation and prayer are blessed means of strengthening faith and hope.