Elder Jeffrey R. Holland taught: “Even as a new star appeared in the heavens to celebrate His mortal birth, Jesus’s ministry was to be characterized as that of “the light and the Redeemer of the world” (Doctrine and Covenants 93:9). He is “the true Light, which lighteth every man that cometh into the world” (John 1:9; see also Doctrine and Covenants 93:2). He is “the light which is in all things” and “the same light that quickeneth [our] understandings” (Doctrine and Covenants 88:11, 13). Most reassuring of all, He is “the light . . . that is endless, that can never be darkened” (Mosiah 16:9).”

Light and darkness are powerful symbols in teaching us of spiritual things and as such are employed regularly in scripture and in Christ’s teachings.

During World War II, one of the darker periods in human history, C. S. Lewis delivered a number of sermons. In one such sermon, he stated “I believe in Christianity as I believe that the Sun has risen, not only because I see it but because by it, I see everything else.”

“I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life.” (John 8:12)

Sources:

Jeffrey R. Holland, Witness for His Names, Deseret Book 2019

C.S. Lewis, The Weight of Glory