Ezra Taft Benson, 13th President of the Church, 1985–1994

The Book of Mormon is the keystone in our witness of Jesus Christ, who is Himself the cornerstone of everything we do. . . . Just as the arch crumbles if the keystone is removed, so does all the Church stand or fall with the truthfulness of the Book of Mormon. . . . If the Book of Mormon be true?and millions have now testified that they have the witness of the Spirit that it is indeed true?then one must accept the claims of the Restoration and all that accompanies it.

A Witness and a Warning: A Modern-day Prophet Testifies of the Book of Mormon (1988), 18–19.