"It makes no difference what is written or about what anyone has said, if what has been said is in conflict with what the LORD has revealed, we can set it aside. My words, and the teachings of any other member of the church, high or low, if they do not square with the revelations we need not accept them. Let us have this matter clear. We have accepted the four standard works as the measuring yardsticks, or balances, by which we measure every man's doctrine." 

Joseph Fielding Smith, Doctrines of Salvation, Volume 3, Page 203

https://www.lds.org/manual/doctrine-and-covenants-and-church-history-student-study-guide/the-worldwide-church/president-joseph-fielding-smith-gospel-theologian-and-writer?lang=eng