The Lord is my Light (comp. John 1:7-9; John 12:35, John 12:36, John 12:46; 1 John 1:5). The statement does not occur in any other place in the Old Testament, though the idea may be found in Isaiah 60:1, Isaiah 60:20; Micah 7:8; and elsewhere.
Light has been well called "this profoundly beautiful name of God" (Delitzsch). And my Salvation (comp. Psalms 18:2; Psalms 62:2, Psalms 62:6). Whom shall I fear? "If God be for us, who can be against us?"
(Romans 8:31). Who can be to be feared? (see Psalms 118:6). Not man certainly; for" what can man do unto us?" Not other gods; for they are nonentities. Not devils; for they can do nothing but by God's permission.
The Lord is the Strength of my life; literally, the stronghold (comp. Psalms 28:8; Psalms 31:4; Psalms 71:2; Psalms 144:2). Of whom shall I be afraid? The question is superfluous, but is repeated to complete the balance of the clauses.