Mosiah 16

9 He is the light and the life of the world; yea, a light that is endless, that can never be darkened; yea, and also a life which is endless, that there can be no more death.

Jesus Christ is the light of the world. I was flying back from Chicago last Friday night. The weather was bad, so the pilot took us to a higher altitude than usual and flew west to take us behind the cold front that was producing storms. I was on the right side of the plane and was reading. I glanced out the window at one point, and saw that there was a gray woolen cloud deck far below that stretched all the way to the western horizon. There at the edge of the visible world the sun was dipping below the horizon. The backdrop of darkening sky was red and orange from the setting sun. I sat back and just stared at the sky and had one of those moments of wonder that come from time to time as we take time to observe the physical beauty of God's creations.

In one of the most beautiful revelations given to the prophet Joseph Smith -- one that he designated as the "olive leaf . . . plucked from the Tree of Paradise, the Lord's message of peace to us" -- the Savior is described this way (D&C 88)

6 He that ascended up on high, as also he descended below all things, in that he comprehended all things, that he might be in all and through all things, the light of truth;
7 Which truth shineth. This is the light of Christ. As also he is in the sun, and the light of the sun, and the power thereof by which it was made.
8 As also he is in the moon, and is the light of the moon, and the power thereof by which it was made;
9 As also the light of the stars, and the power thereof by which they were made;
10 And the earth also, and the power thereof, even the earth upon which you stand.
11 And the light which shineth, which giveth you light, is through him who enlighteneth your eyes, which is the same light that quickeneth your understandings;
12 Which light proceedeth forth from the presence of God to fill the immensity of space—
13 The light which is in all things, which giveth life to all things, which is the law by which all things are governed, even the power of God who sitteth upon his throne, who is in the bosom of eternity, who is in the midst of all things.