Moses 5

58 And thus the Gospel began to be preached, from the beginning, being declared by holy angels sent forth from the presence of God, and by his own voice, and by the gift of the Holy Ghost.

D&C 39

6 And this is my gospel--repentance and baptism by water, and then cometh the baptism of fire and the Holy Ghost, even the Comforter, which showeth all things, and teacheth the peaceable things of the kingdom.

D&C 50

13 Wherefore, I the Lord ask you this question--unto what were ye ordained?

14 To preach my gospel by the Spirit, even the Comforter which was sent forth to teach the truth.

15 And then received ye spirits which ye could not understand, and received them to be of God; and in this are ye justified?

16 Behold ye shall answer this question yourselves; nevertheless, I will be merciful unto you; he that is weak among you hereafter shall be made strong.

17 Verily I say unto you, he that is ordained of me and sent forth to preach the word of truth by the Comforter, in the Spirit of truth, doth he preach it by the Spirit of truth or some other way?

18 And if it be by some other way it is not of God.

19 And again, he that receiveth the word of truth, doth he receive it by the Spirit of truth or some other way?

20 If it be some other way it is not of God.

21 Therefore, why is it that ye cannot understand and know, that he that receiveth the word by the Spirit of truth receiveth it as it is preached by the Spirit of truth?

22 Wherefore, he that preacheth and he that receiveth, understand one another, and both are edified and rejoice together.

23 And that which doth not edify is not of God, and is darkness.

24 That which is of God is light; and he that receiveth light, and continueth in God, receiveth more light; and that light groweth brighter and brighter until the perfect day.

The Holy Ghost is the Testifier of Truth, who can teach men things they cannot teach one another. ("The Father, Son, and Holy Ghost," Ensign, Mar. 1998, p. 7)

Joseph B. Wirthlin

He is a revelator and teacher who conveys information to our spirits with far more certainty than is possible by our natural senses. ( "Deep Roots," Ensign, Nov. 1994, p. 76)

Bruce R. McConkie

Spiritual things, without which there is no salvation, can be known only by the power of the Spirit. Paul lays it down as an eternal principle that "the things of God knoweth no man, except he has the Spirit of God." (JST, 1 Corinthians 2:11.) It could not be otherwise, for salvation is found in a spiritual realm-in a different dimension of existence, a realm that is separate and apart and removed from this mortal sphere. Hence, the Spirit of God has the divine commission to teach spiritual truths by conformity to which the saints can qualify to gain the promised spiritual heights. (A New Witness for the Articles of Faith, pp.267-268)

David A. Bednar

The Holy Ghost is the third member of the Godhead, and He is the teacher and witness of all truth. Elder James E. Talmage explained: "The office of the Holy Ghost in His ministrations among men is described in scripture. He is a teacher sent from the Father; and unto those who are entitled to His tuition He will reveal all things necessary for the soul's advancement" (The Articles of Faith, 12th ed. [1924], 162).

We should always remember that the Holy Ghost is the teacher who, through proper invitation, can enter into a learner's heart. Indeed, you and I have the responsibility to preach the gospel by the Spirit, even the Comforter, as a prerequisite for the learning by faith that can be achieved only by and through the Holy Ghost (see D&C 50:14). In this regard, you and I are much like the long, thin strands of glass used to create the fiber-optic cables through which light signals are transmitted over very long distances. Just as the glass in these cables must be pure to conduct the light efficiently and effectively, so we should become and remain worthy conduits through whom the Spirit of the Lord can operate.

But brothers and sisters, we must be careful to remember in our service that we are conduits and channels; we are not the light. "For it is not ye that speak, but the Spirit of your Father which speaketh in you" (Matthew 10:20). It is never about me and it is never about you. In fact, anything you or I do as an instructor that knowingly and intentionally draws attention to self--in the messages we present, in the methods we use, or in our personal demeanor--is a form of priestcraft that inhibits the teaching effectiveness of the Holy Ghost. "Doth he preach it by the Spirit of truth or some other way? And if it be by some other way it is not of God" (D&C 50:17-18). ["Seek Learning By Faith," Evening With a General Authority, February 2, 2006, Address Delivered to CES Educators, p. 4]