You might as well deny "Mormonism," and turn away from it, as to oppose the plurality of wives. Let the Presidency of this Church, and the Twelve Apostles, and all the authorities unite and say with one voice that they will oppose that doctrine, and the whole of them would be damned. What are you opposing it for? It is a principle that God has revealed for the salvation of the human family. He revealed it to Joseph the Prophet in this our dispensation; and that which he revealed he designs to have carried out by his people.
[Source: Journal of Discourses, Vol.5, p.204 - p.205, Heber C. Kimball, October 12, 1856]