President Brigham Young taught,

“The revelations of God contain correct doctrine and principle, so far as they go; but it is impossible for the poor, weak, low, groveling, sinful inhabitants of the earth to receive a revelation from the Almighty in all its perfections…If an angel should come to this congregation, or visit any individual of it, and use the language he uses in heaven, what would we be benefitted? Not any, because we could not understand a word he said. When angels come to visit mortals, they have to condescend to and assume, more or less, the condition of mortals, they have to descend to our capacities in order to communicate with us” (JD 2:314).

President George A. Smith (grandfather to George Albert Smith) taught,

“When the Lord reveals anything to men He reveals it in language that accords with their own. If any of you were to converse with an angel, and you used strictly grammatical language he would do the same. But if you used two negatives in a sentence the heavenly messenger would use language to correspond with your understanding…” (JD 12:335, Nov. 15, 1868).