A Christian professor and evangelist said that after 30 years in the Mormon Church,
It also surprised me that an intelligent woman with so many apparent apprehensions, questions and nagging doubts along the way wouldn’t even have been aware for 30 years there were other Bible versions in addition to the standard LDS-authorized King James Version but I suppose it comes down to the need to justify a conversion experience combined with the lack of a foundational knowledge of truth in Christianity with which to recognize falsehood....
You have to understand that Mormons base their view of truth on feelings, not facts. Facts can stare them straight in the face but if it makes them feel bad or uncomfortable they consider it untrue. They do not look at spiritual things with an objective mind but rather base their spiritual knowledge, or epistemology, on how it makes them feel.
The biggest hurdle in getting people out of Mormonism, is making them look at facts and think for themselves rather than just feel.