JEHOVAH GIVES ALL REVELATION. All revelation since the fall has
come through Jesus Christ, who is the Jehovah of the Old Testament.
In all of the scriptures, where God is mentioned and where he
has appeared, it was Jehovah who talked with Abraham, with Noah,
Enoch, Moses and all the prophets. He is the God of Israel, the
Holy One of Israel; the one who led that nation out of Egyptian
bondage, and who gave and fulfilled the Law of Moses. The Father
has never dealt with man directly and personally since the fall,
and he has never appeared except to introduce and bear record
of the Son. Thus the Inspired Version [JST]
records that 'no man hath seen God [the Father] at
any time, except he [God
the Father] hath borne record of the Son." [JST,
Jn 1:19.]
...
CHRIST MAY SPEAK AS THE FATHER. In giving revelations our Savior speaks at times for himself; at other times for the Father, and in the Father's name, as though he were the Father, and yet it is Jesus Christ, our Redeemer who gives the message. So, we see, in Doctrine and Covenants 29:1, that he introduces himself as 'Jesus Christ, your Redeemer,' but in the closing part of the revelation he speaks for the Father, and in the Father's name as though he were the Father, and yet it is still Jesus who is speaking, for the Father has put his name on him for that purpose.
FIRST VISION AND REVELATION. We have a wonderful
illustration of how revelation comes through Christ presented
to us in the Vision given to the Prophet Joseph Smith. The Father
and the Son appeared unto him, but it was not the Father who answered
his question! The Father introduced Joseph to His Son, and it
was the Son who answered the important question and gave the instruction.
Had Joseph Smith come home from the grove and declared that the
Father and the Son appeared to him and that the Father spoke to
him and answered his question while the Son stood silently by,
then we could have accepted the story as a fraud. Joseph Smith
was too young and inexperienced to know this at the time, but
he made no mistake, and his story was in perfect harmony with
divine truth, with the divine law that Christ is the Mediator
between God [the Father] and man.
In divers manners] How does God reveal himself? Though
the ways may be infinite, the perfect and crowning way is by direct
revelation, by visions, by personal visitations. According to
the laws of mediation and intercession which the Father himself
ordained, he has chosen to reveal himself through the Son, ordaining
that all revelation shall come through the Son, though that holy
personage frequently speaks in the Father's name by divine investiture
of authority; that is, he speaks in the first person as though
he were the Father, because the Father has placed his name
upon the Son. The sole reason for the personal appearance
of the Father is to introduce the Son, as is illustrated by the
appearance of the Father and the Son at the commencement of this
dispensation. (Jos. Smith 2:12 20.) And hence the Biblical statement:
"No man hath seen God at any time, except he hath borne record
of the Son." (Inspired Version, John 1:19.) Christ the Son
is, of course, the God of Israel through whom the will of the
Father was manifest to that chosen people. [RE: Hebr 1:1.]
See also James E. Talmage, The Articles of Faith, 466-473. "The Father and The Son: A Doctrinal Exposition by The First Presidency and The Twelve." This explains the three ways in which Jesus can be referred to as The Father (one of which is Divine Investiture of Authority), and the one way in which He cannot.