All Things Shall Be Revealed During the Millennium
32 Yea, verily I say unto you, in that day when the Lord shall come, he shall reveal all things-
33 Things which have passed, and hidden things which no man knew, things of the earth, by which it was made, and the purpose and the end thereof-
34 Things most precious, things that are above, and things that are beneath, things that are in the earth, and upon the earth, and in heaven.
Bruce R. McConkie
We have the fulness of the everlasting gospel, meaning that we have all that is needed to gain the fulness of salvation. We have every truth, doctrine, and principle, every rite, power, and ordinance -- all that is needed -- to gain exaltation in the highest heaven of the celestial world. But we do not know all things; there are doctrines in endless array of which we know next to nothing; indeed, there are more things in the darkness of the unknown than there are in the light of the known. We do not even know what the faithful knew in Enoch's Zion, nor among the Nephites when they dwelt in righteousness for generations. We do not know what is on the sealed portion of the plates from which the Book of Mormon came. Ours is a day for drinking milk; the day when we, as a people at least, can partake of the meat of the word is in the future.
That future is millennial. In that day, "all things shall become new," saith the Lord, "that my knowledge and glory may dwell upon all the earth. . . . Yea, verily I say unto you, in that day when the Lord shall come, he shall reveal all things -- Things which have passed, and hidden things which no man knew, things of the earth, by which it was made, and the purpose and the end thereof -- Things most precious, things that are above, and things that are beneath, things that are in the earth, and upon the earth, and in heaven." (D&C 101:25, 32-34.) As we ponder these heaven-sent words, we are led to exclaim: Thanks be to him who is the Way, the Truth, and the Life, who knows all things and who seeks to pour out his revelations, and all the knowledge of eternity, upon all who will receive them. Ere long the dark veil of ignorance and unbelief that covers the earth and blinds the minds of men shall be pierced. Light and truth will fall from heaven as does rain from the clouds above.
The knowledge of God, the knowledge of those Gods whom it is life eternal to know, shall be in every heart. No longer will theologians suppose that God is a spirit essence that fills immensity while he dwells in the human heart. No longer will philosophers pontificate about some great first cause that inexplicably brought order into a chaotic universe. No longer will Babylonish churches place crucifixes in the hands, or the images of Diana of the Ephesians, as it were, and no longer will they worship the works of their own hands in the great cathedrals of Christendom. The knowledge of God, the truth about God, the fact that he is a Holy Man, will come by revelation into every human heart. The knowledge of God will cover the earth.
All things are to be revealed in the millennial day. The sealed part of the Book of Mormon will come forth; the brass plates will be translated; the writings of Adam and Enoch and Noah and Abraham and prophets without number will be revealed. We shall learn a thousand times more about the earthly ministry of the Lord Jesus than we now know. We shall learn great mysteries of the kingdom that were not even known to those of old who walked and talked with the Eternal One. We shall learn the details of the creation and the origin of man and what fools mortals are to follow the fads of the evolving evolutionary nonsense that litters the textbooks of academia. Nothing in or on or over the earth will be withheld from human ken, for eventually man, if he is to be as his Maker, must know all things.
Hear in this connection these words of Nephi: In that day, "the earth shall be full of the knowledge of the Lord as the waters cover the sea. Wherefore, the things of all nations shall be made known; yea, all things shall be made known unto the children of men. There is nothing which is secret save it shall be revealed; there is no work of darkness save it shall be made manifest in the light; and there is nothing which is sealed upon the earth save it shall be loosed. Wherefore, all things which have been revealed unto the children of men shall at that day be revealed." (2 Ne. 30:15-18.) Surely man could not ask for more than this in the way of light and truth and knowledge, and yet expect to remain in the flesh as a mortal and be in process of working out his salvation. Surely this is the day in which the Lord shall fulfill the promise of holy writ that says: "God shall give unto you knowledge by his Holy Spirit, yea, by the unspeakable gift of the Holy Ghost, [knowledge] that has not been revealed since the world was until now; which our forefathers have awaited with anxious expectation to be revealed in the last times, which their minds were pointed to by the angels, as held in reserve for the fulness of their glory; a time to come in the which nothing shall be withheld, whether there be one God or many gods, they shall be manifest." (D&C 121:26-28.) That this outpouring of divine goodness has already commenced is not open to question. That it will continue, in far greater measure, after our Lord comes again, who can doubt? (The Millennial Messiah, pp.675-677)