Warning! The following quotes contain damnable heresy!
"No man or woman in this dispensation will ever enter into the celestial kingdom of God without the consent of Joseph Smith … every man and woman must have the certificate of Joseph Smith, junior, as a passport to their entrance into the mansion where God and Christ are … [Joseph Smith] reigns there as supreme a being in his sphere, capacity, and calling, as God does in heaven. Many will exclaim—'Oh, that is very disagreeable! It is preposterous! We cannot bear the thought!' But it is true." — Brigham Young, Journal of Discourses, vol. 7, pp. 289-291.
"NO SALVATION WITHOUT ACCEPTING JOSEPH SMITH. If Joseph Smith was verily a prophet, and if he told the truth when he said that he stood in the presence of angels sent from the Lord, and obtained keys of authority, and the commandment to organize the Church of Jesus Christ once again on the earth, then this knowledge is of the most vital importance to the entire world. No man can reject that testimony without incurring the most dreadful consequences, for he cannot enter the kingdom of God. It is, therefore the duty of every man to investigate that he may weigh this matter carefully and know the truth." — Joseph Fielding Smith, Doctrines of Salvation, 1:189-190.
"I will preach on the plurality of Gods. I have selected this text for that express purpose. I wish to declare I have always and in all congregations when I have preached on the subject of the Deity, it has been the plurality of Gods. It has been preached by the Elders for fifteen years. I have always declared God to be a distinct personage, Jesus Christ a separate and distinct personage from God the Father, and the Holy Ghost was a distinct personage and a Spirit: and these three constitute three distinct personages and three Gods. If this is in accordance with the New Testament, lo and behold! we have three Gods anyhow, and they are plural; and who can contradict it?" — Joseph Smith, Teachings of the Prophet Joseph Smith, p. 369.