... The man Joseph, the husband of Mary, did not, that we know of, have more than one wife, but Mary the wife of Joseph had another husband. On this account infidels have called the Savior a bastard. This is merely a human opinion upon one of the inscrutable doings of the Almighty. That very babe that was cradled in the manger, was begotten, not by Joseph, the husband of Mary, but by another Being. Do you inquire by whom? He was begotten by God our heavenly Father. This answer may suffice you'"you need never inquire more upon that point. Jesus Christ is the only begotten of the Father, and he is the Saviour of the world, and full of grace and truth.
... if you have in your hearts to say: '"We will pass along in the Church without obeying or submitting to it in our faith or believing this order, because, for aught that we know, this community may be broken up yet, and we may have lucrative offices offered to us; we will not, therefore, be polygamists lest we should fail in obtaining some earthly honor, character and office, etc,'"'"the man that has that in his heart, and will continue to persist in pursuing that policy, will come short of dwelling in the presence of the Father and the Son, in celestial glory. The only men who become Gods, even the Sons of God, are those who enter into polygamy. Others attain unto a glory and may even be permitted to come into the presence of the Father and the Son; but they cannot reign as kings in glory, because they had blessings offered unto them, and they refused to accept them. The Lord gave a revelation through Joseph Smith, His servant; and we have believed and practiced it....
The Lamanites or Indians are just as much the children of our Father and God as we are. So also are the Africans. But we are also the children of adoption through obedience to the Gospel of his Son. Why are so many of the inhabitants of the earth cursed with a sin of blackness? It comes in consequence of their fathers rejecting the power of the Holy Priesthood, and the law of God. They will go down to death. And when all the rest of the children have received their blessings in the Holy Priesthood, then that curse will be removed from the seed of Cain, and they will then come up and possess the priesthood, and receive all the blessings which we now are entitled to. The volition of the creature is free; this is a law of their existence, and the Lord cannot violate his own law; were he to do that, he would cease to be God.
[Journal of Discourses, Liverpool, England, 1853-86, 11:266-272, in The Complete Discourses of Brigham Young, Ed. Richard S. Van Wagoner, Smith-Pettit Foundation, Salt Lake City (2009), http://bit.ly/BY-discourses]