Bruce R. McConkie
"How can those who do not believe and obey the law already given ever expect to receive more revelation from on high? If men will not believe the Book of Mormon, they shut out of their lives the other revelations that have come in this dispensation. And if they do not believe all that God has now revealed, what justification would there be for him to reveal other great and important things pertaining to his earthly affairs and his heavenly kingdom?" (Mortal Messiah, Book 4, p. 371)