The Temple: the door to exaltation
There are many wonderful answers surrounding the question of obtaining exaltation. Joseph Smith provided an abridgement to the aged old question of how when he explained that the fulness of the priesthood is received only in the temple.
How? Through washings, anointings, solemn assemblies, oracles in holy places, conversations, ordinances, endowments, and sealings. (D&C 124:40) It is in the temple that we enter into the patriarchal order or the order of the priesthood that bears the name “the new and everlasting covenant of marriage.” (McConkie, A New Witness, pg. 315.)