Lehi’s powerful doctrine of the Fall is not necessarily original or unique. He himself indicates that he got it from these he had read. Careful study of Old Testament passages and early Jewish writings reveals that many of the ideas expressed by Lehi were known and understood anciently, but Lehi has vastly expounded upon them. This doctrine appears to be closely linked to the temple, and is one of the plain and precious truths lost but then restored by the Book of Mormon.