The knowledge required to sin is not just belief or cause to believe, as we have when someone tells us from the pulpit or we read it in the scriptures or hear the prophet tell us, it means real personal "knowledge". - Seeker

"And now, how much more cursed is he that knoweth the will of God and doeth it not, than he that only believeth, or only hath cause to believe, and falleth into transgression?" - Alma 32:19