Light

The Bible refers to God and Christ as sources of light and enlightenment, and Satan as the source of darkness and blindness. Scriptures in addition to the Bible, especially the Doctrine and Covenants, give even more insight into the source, nature, and purpose of light.

From Doctrine and Covenants, section 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;

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.

40 For intelligence cleaveth unto intelligence; wisdom receiveth wisdom; truth embraceth truth; virtue loveth virtue; light cleaveth unto light; mercy hath compassion on mercy and claimeth her own; justice continueth its course and claimeth its own; judgment goeth before the face of him who sitteth upon the throne and governeth and executeth all things.

44 And they give light to each other in their times and in their seasons, in their minutes, in their hours, in their days, in their weeks, in their months, in their years—all these are one year with God, but not with man.

45 The earth rolls upon her wings, and the sun giveth his light by day, and the moon giveth her light by night, and the stars also give their light, as they roll upon their wings in their glory, in the midst of the power of God.

49 The light shineth in darkness, and the darkness comprehendeth it not; nevertheless, the day shall come when you shall comprehend even God, being quickened in him and by him.

50 Then shall ye know that ye have seen me, that I am, and that I am the true light that is in you, and that you are in me; otherwise ye could not abound.

Thus, the revelations in the Doctrine and Covenants tell us that light powers the universe and is the law that governs it. This light emanates from God and Christ; it is intelligence, or light and truth; it can fill us, if we focus our feelings, thoughts, and actions upon the Lord. Filled with this light, men can comprehend even God; darkness cannot comprehend God.

From Doctrine and Covenants, section 93:

2 And that I am the true light that lighteth every man that cometh into the world;

9 The light and the Redeemer of the world; the Spirit of truth, who came into the world, because the world was made by him, and in him was the life of men and the light of men.

28 He that keepeth his commandments receiveth truth and light, until he is glorified in truth and knoweth all things.

29 Man was also in the beginning with God. Intelligence, or the light of truth, was not created or made, neither indeed can be.

31 Behold, here is the agency of man, and here is the condemnation of man; because that which was from the beginning is plainly manifest unto them, and they receive not the light.

32 And every man whose spirit receiveth not the light is under condemnation.

36 The glory of God is intelligence, or, in other words, light and truth.

37 Light and truth forsake that evil one.

Christ is the spirit of truth; He is the light of men. This light (intelligence) had no beginning—it has always existed. Man has agency—he can choose light or darkness. Those who keep the Lord's commandments will receive more and more light until they are glorified and know all things.

From Doctrine and Covenants, section 45:

7 For verily I say unto you that I am Alpha and Omega, the beginning and the end, the light and the life of the world—a light that shineth in darkness and the darkness comprehendeth it not.

9 And even so I have sent mine everlasting covenant into the world, to be a light to the world, and to be a standard for my people, and for the Gentiles to seek to it, and to be a messenger before my face to prepare the way before me.

28 And when the times of the Gentiles is come in, a light shall break forth among them that sit in darkness, and it shall be the fulness of my gospel;

29 But they receive it not; for they perceive not the light, and they turn their hearts from me because of the precepts of men.

The everlasting gospel has always existed, but it has been restored in its fulness in the Last Dispensation of Time as The Church of Jesus Christ of Latter-day Saints. The restored gospel has largely been rejected by men, because of the precepts of men.