Charles Ellicott Commentary Psalms 62:2

"He only is my rock and my salvation: [He is] my high tower; I shall not be greatly moved." — Psalms 62:2 (ASV)

Defence. —Properly, high tower, as so often. The metaphor is important here from the contrast with the tottering wall of next verse.

Shall not be greatly moved ... — i.e. , shall not be made to totter or fall.