The Light of Christ emanates from Christ and is disseminated to us through the Holy Ghost. This function of the third member of the godhead is commonly referred to as the Holy Spirit. (As an example see Mosiah 3:19) It is also appropriately called the light of truth, the voice of Christ, the voice of truth, the spirit of truth, the word(s) of Christ, the Word, His voice, my voice, the voice of the Good Shepherd, the Spirit of Christ, the Spirit of God, the Spirit of the Lord, and the Light of Christ.
The function of the Light of Christ is to teach us good from evil, and right from wrong. Any time we hear or feel a prompting to choose the right, to do good, to be kind, to express love, to serve or bear testimony, that knowledge came from Christ.
The Holy Spirit also is the source of our conscience, is a free gift to all mankind because of the Atonement of Christ. It has power to warn, entice, enlighten, and urge to obedience. It will expand its mission to become a teacher of great eloquence as we give heed to its guiding voice.
Even in its most powerful role, the Holy Spirit generally remains a “Still Small Voice”, and even profound truths can come silently, and require faith to hear and obey. Through righteous experience, and obedience to the voice of the Holy Spirit, the Light of Christ becomes more powerful. It communicates greater and greater truths, and in time administers the spiritual gifts, such as faith, hope, prophecy, knowledge, teaching, believing, healings, and other miracles. (See: Moroni 10:1-34)
“Moroni says that the gifts of God come from Christ, by the power of the Holy Ghost and by the Spirit of Christ. (Moroni 10) In other words, the gifts come by the power of that Spirit who is the Holy Ghost, but the Spirit of Christ (or light of Christ) is the agency through which the Holy Ghost operates.” (McConkie, Mormon Doctrine p. 314, parenthetical comments in original)
The operation of the Holy Spirit should not be confused with that of the Holy Ghost. When the Holy Ghost speaks in His role as a revelator, the voice (knowledge, feeling or impression) is louder and cannot easily be mistaken. The Holy Ghost communicates truth in a more powerful way, which enlightens the soul with poignant truth. When we are so blessed to enjoy profound revelation, and glorious manifestations, these also come through the Holy Ghost.
This type of grand communiqué becomes an abundant part of our lives only after we have learned to faithfully follow the lesser gift of the guiding voice of the Holy Spirit. Prior to this the Holy Ghost only speaks on inspiring occasions, and for a special witness, such as when we first gained a testimony that Jesus Christ truly is our Savior.
The Holy Ghost is also referred to as the Holy Spirit, or other terms which apply to the light of Christ due to the fact that the operation of the agency of the Holy Spirit, and that of the Holy Ghost, becomes nearly indistinguishable as one grows nearer and nearer to sanctification. The Holy Ghost is also correctly referred to as the Comforter, the Holy Spirit of Promise, and the Spirit of God.
For the sake of clarity, throughout this Un-Blog the term “Holy Spirit” refers to the Holy Ghost acting in His assigned role as the light of Christ. Whenever the term “Holy Ghost” is used, reference is being made to the third member of the Godhead speaking in His role as a revelator.
Both the Father and the Son use the Holy Ghost to communicate truth to mankind. The Father speaks via the Holy Ghost in accordance with divine law. There is a law attached to all blessings (D&C 130:21-22). The Father administers blessings when we have obeyed the associated laws. This is due to the justice which is one of the inalterable attributes of the Father.
When Jesus Christ speaks through the Holy Ghost as our conscience, He speaks to us without the requirement for us to be worthy or even qualified. The Light of Christ comes to us essentially prepaid through the Grace and Mercy of the Atonement which Jesus paid for by the shedding of his own blood. (D&C 88:5-6). Because of the Atonement, Christ can extend mercy to us, and reach us via the Holy Spirit even when we don’t want it, or know how much we need it.
The following diagram may help clarify the roles of the Godhead.