Transfiguration is a special change in appearance and nature which is wrought upon a person or thing by the power of God. This divine transformation is from a lower to a higher state; it results in a more exalted, impressive, and glorious condition. . . .
By the power of the Holy Ghost many prophets have been transfigured so as to stand in the presence of God and view the visions of eternity (Bruce R. McConkie, Mormon Doctrine, 2nd ed., p. 803). — The Pearl of Great Price Student Manual, p. 4