Dallin H. Oaks
"Moroni makes an explicit promise of a spiritual manifestation to one who seeks to know the truthfulness of the Book of Mormon. But, it must be noted, this promise is only extended to the person who will 'ask with a sincere heart, with real intent, having faith in Christ.' The manifestation that is given in response to this promise, therefore, is not a sign given to convert an unbeliever. It is a sign that follows individual faith and commitment." (The Lord's Way, p. 98)