He only is my rock and my salvation: he is my defence; I shall not be moved.
He only is my rock and my salvation,....
See Gill on "Psalms 62:2";
he is my defence; these epithets of God are repeated, to strengthen his faith and hope in him, and to encourage a patient waiting upon him;
I shall not be moved; neither greatly, nor at all; his faith gets fresh strength and rigour, the more he considers God as his rock, salvation, defence, and refuge; See Gill on "Psalms 62:2".