“The Law that a man shall take his [deceased] brother's wife and raise up seed unto him as it was in Israel must be again established.” — Hyrum Smith (Franklin D. Richards, “Scriptural Items”Notebook, 12 August 1843, LDS Archives)

“Everything at Nauvoo went with a rush. We had to build the temple with the trowel in one hand the sword in the other and mobs were upon us all the while and many crying out, ‘Oh the temple can’t be built.’ I told them it should be built; this Church should not fall, and the Lord said if we did not build it, we should be rejected as a Church with our dead. Why did He say it? Because the Saints were becoming slothful and covetous and would spend their means upon fine houses for themselves before they would put it into a house for the Lord. But we went at it and finished it and turned it over into the hands of the Lord in spite of earth and hell and the Brethren were so faithful at it that we labored day and night to give them their endowments.” — Brigham Young (Complete Discouress of Brigham Young <15 August 1847> pages 241–242)

“There is a law, irrevocably decreed in heaven before the foundations of this world, upon which all blessings are predicated — And when we obtain any blessing from God, it is by obedience to the law upon which it is predicated.” (D&C 130:20–21)

“If Joseph Smith, jun., the Prophet, had followed the Spirit of revelation in him he never would have gone to Carthage. Do you understand that? …Joseph intended to go West; he designed to raise a company to come to the very country we now occupy. He said, ‘I can see life and liberty and revelation in that course, but if I return to give myself up, it is death and darkness to the full; I am like a lamb led to the slaughter,’ and never for one moment did he say that he had one particle of light in him after he started back from Montrose to give himself up in Nauvoo. This he did through the persuasion of others.” — Brigham Young (Complete Discourses of Brigham Young <21 March 1858> page 1412)

“It was the intention of God to raise up a Kingdom of [Kings and] Priests from among this people — and it is my duty to assist them in becoming such — but they are slow to learn, though they have eyes but see not, have ears but hear not, yet as a people we are a Wonder to the World, we have good peace, now, but shall have more, if the people will only do right.” — Brigham Young (Salt Lake School of the Prophets, 1867–1883 <27 May 1871> page 194)

“The laws of the Lord are immutable; we must act in perfect compliance with what is revealed to us.” — Joseph Smith (As recalled by George A. Smith, discourse, 25 December 1874, in Millennial Star vol .37 <2 February 1875> page 67)

“If Jesus Christ was the Son of God, and [the apostle] John [in Revelation 1:6] discovered that God the Father of Jesus Christ had a Father [i.e. the Grandfather], you may suppose that He had a Father also [i.e. the Great-Grandfather]. Where was there ever a son without a father? And where was there ever a father without first being a son? Whenever did a tree or anything spring into existence without a progenitor? And everything comes in this way.” — Joseph Smith (Teachings of the Prophet Joseph Smith <16 June 1844> page 373)

THE RIGHT OF THE FIRSTBORN
Some may think that the Right of the Firstborn referenced in Abraham 1:3 is simply the priesthood right that all fathers in Israel may have. Yet, according to the Egyptian Alphabet and Grammar, written at the time the Book of Abraham was translated, The Right of the Firstborn was a One Man Office in the Priesthood that descended from the beginning of the world from Adam!
“Ba eth Ka: Adam or the first man or first king.”
“Ba eth kee: The next from Adam, one ordained under him, a patriarch or the right of the first born.”
“Ba eth Ki: The Third Patriarch or right of the firstborn.”
“Ba eth Ko: The fourth patriarch from Adam, the right of [the] First born.”
(“Joseph Smith’s Grammar and Alphabet of the Egyptian Language” pages 12, 17, 16, 15)

“The Sacrament was also administered at times when [the Prophet] Joseph appointed, after the ancient order; that is, warm bread to break easy was provided, and broken into pieces as large as my fist, and each person had a glass of wine and sat and ate the bread and drank the wine; and Joseph said that was the way that Jesus and his disciples partook of the bread and wine; and this was the order of the church anciently, and until the church went into darkness.” (Salt Lake School of the Prophet Minutes, 1867 – 1883 <October 3, 1883> page 503)

“Redemption from the original sin is without faith or works; redemption from our own sins is given through faith and works. Both are the gifts of free grace; but while one is a gift forced upon us unconditionally, the other is a gift merely offered to us conditionally. The reception of the one is compulsory; the reception of the other is voluntary. Man cannot by any possible act, prevent his redemption from the fall; but he can utterly refuse and prevent his redemption from the penalty of his own sins.” — Orson Pratt (Millennial Star vol. 12 <1 March 1850> page 69)