Elder Orson Pratt has written extensively on the doctrines of this church, and upon this particular doctrine. When he writes and speaks upon subjects with which he is acquainted and understands, he is a very sound reasoner; but when he has written upon matters of which he knows nothing'"his own philosophy, which I call vain philosophy'"he is wild, uncertain, and contradictory. ... Jesus Christ is known in the scriptures as the only begotten of the Father, full of grace and truth, and it is written of Him as being the brightness of the Father's glory and the express image of His person. The word image we understand in the same sense as we do the word in the 3rd verse of the 5th chapter of Genesis, '"And Adam lived an hundred and thirty years, and begat a son in his own likeness, after his image.'" I am quite satisfied to be made aware by the scriptures, and by the Spirit of God, that He is not only the God and Father of Jesus Christ, but is also the Father of our spirits and the Creator of our bodies which bear His image as Seth bore the image of his father Adam.
He (God) created man, as we create our children; for there is no other process of creation in heaven, on the earth, in the earth, or under the earth, or in all the eternities, that is, that were, or that ever will be.
Since the founding of the Roman empire monogamy has prevailed more extensively than in times previous to that. The founders of that ancient empire were robbers and women stealers, and made laws favoring monogamy in consequence of the scarcity of women among them, and hence this monogamic system which now prevails throughout all Christendom, and which has been so fruitful a source of prostitution and whoredom throughout all the Christian monogamic cities of the Old and New World, until rottenness and decay are at the root of their institutions both national and religious.." In the congregation is visiting Speaker of the U.S. House of representatives and future vice-president Schuyler Colfax.
[Journal of Discourses. Liverpool, England, 1853-86. 11:119-128, quoted in The Complete Discourses of Brigham Young, Ed. Richard S. Van Wagoner, Smith-Pettit Foundation, Salt Lake City (2009), http://bit.ly/BY-discourses]