Joseph Smith – On Truth

“The first and fundamental principle of our holy religion is, that we believe that we have a right to embrace all, and every item of truth, without limitation or without being circumscribed or prohibited by the creeds or superstitious notions of men, or by the dominations of one another, when that truth is clearly demonstrated to our minds, and we have the highest degree of evidence of the same.”

Joseph Smith, Jr., Letter from Joseph Smith to Isaac Galland, Mar. 22, 1839, Liberty Jail, Liberty, Missouri, published in Times and Seasons, Feb. 1840, pp. 53–54