I would argue that creedal truths are the least important elements of faith. Let's say, for the sake of argument, that what Mormons assert about Joseph Smith is true. What then? What then for Mormons? Surely, it is not the knowledge that Smith was a prophet that is important, but rather what that truth does in one's life as a believer. The truth of religion, if it has any truth, must always be a truth of transformation, an existential rather than epistemological truth. The ultimate truth of Mormonism or Catholicism or Judaism is not what you believe but what you do.