Joseph Smith taught that the origins of modern temple ordinances go back beyond the foundation of the world.1 Even for believers, the claim that rites known anciently have been restored through revelation raises complex questions because we know that revelation almost never occurs in a vacuum. Rather, it comes most often through reflection on the impressions of immediate experience, confirmed and elaborated through subsequent study and prayer.2 Because Joseph Smith became a Mason not long before he began to introduce others to the Nauvoo endowment, some suppose that Masonry must have been the starting point for his inspiration on temple matters. The real story, however, is not so simple. Though the introduction of Freemasonry in Nauvoo helped prepare the Saints for the endowment — both familiarizing them with elements they would later encounter in the Nauvoo temple and providing a blessing to them in its own right — an analysis of the historical record provides evidence that significant components of priesthood and temple doctrines, authority, and ordinances were revealed to the Prophet during the course of his early ministry, long before he got to Nauvoo. Further, many aspects of Latter-day Saint temple worship are well attested in the Bible and elsewhere in antiquity. In the minds of early Mormons, what seems to have distinguished authentic temple worship from the many scattered remnants that could be found elsewhere was the divine authority of the priesthood through which these ordinances had been restored and could now be administered in their fulness. Coupled with the restoration of the ordinances themselves is the rich flow of modern revelation that clothes them with glorious meanings. Of course, temple ordinances — like all divine communication — must be adapted to different times, cultures, and practical circumstances. Happily, since the time of Joseph Smith, necessary alterations of the ordinances have been directed by the same authority that first restored them in our day.