See also: D&C 76:86-88; John 14:1-6
I could explain a hundred fold more than I ever have of the glories of the kingdoms manifested to me in the vision, were I permitted, and were the people prepared to receive them.
The Lord deals with this people as a tender parent with a child, communicating light and intelligence and the knowledge of his ways as they can bear it. The inhabitants of the earth are asleep; they know not the day of their visitation. — Joseph Smith, Teachings of the Prophet Joseph Smith, p. 305
Elder James E. Talmage explained the relationship between obedience and blessings: “The Lord has said that according to the laws we obey here shall we receive from Him. We speak of rewards just as we speak of punishments. But rewards and punishments will come through the operation of law. The Lord has spoken illustrating that great truth by reference to what He had already revealed respecting the kingdoms or orders of glory, to this effect – If a man cannot or will not obey celestial laws, that is, live in accordance with the celestial requirements, he must not think that he is discriminated against when he is excluded from the celestial kingdom, because he could not abide it, he could not live there. If a man cannot or will not obey the terrestrial law he cannot rationally hope for a place in the terrestrial kingdom. If he cannot live the yet lower law—the telestial law – he cannot abide the glory of a telestial kingdom, and he will have to be assigned therefore to a kingdom without glory. I rejoice in the consistency and order of the Lord’s plan and in His revelations to us.” — D&C Student Manual, p. 198; Conference Report, October 1929, p. 69
It is very clear in D&C 76:30-37, that the only persons who will be completely overcome by this dreadful fate [“the second death,” see Jacob 3:11] are the sons of perdition, who go with the devil and his angels into “outer darkness.” All the rest of mankind, even the wicked, will receive some measure of salvation after they suffer the wrath of God. However, they will of necessity be brought to repentance and acceptance of the gospel of Jesus Christ as far as it will apply to them. They will not be given the ordinances which do not pertain in their kingdoms. From the reading of other passages we discover that there will be great multitudes embracing the vast majority of mankind, who will never be privileged to come back to dwell in the presence of the Father and the Son. These receive banishment from their presence, but not entirely do they get beyond the divine benediction. . . .
All those who are permanently subject to the second death are those who have had the testimony of the Holy Ghost and who have known the truth and then have rejected it and put Christ to open shame.” (Joseph Fielding Smith, Answers to Gospel Questions, 1:76, 78) — Book of Mormon Student Manual, p. 46
God thus takes into merciful account not only our desires and our performance, but also the degrees of difficulty which our varied circumstances impose upon us. No wonder we will not complain at the final judgment, especially since even the telestial kingdom’s glory “surpasses all understanding” (D&C 76:89). God delights in blessing us, especially when we realize “joy in that which [we] have desired” (D&C 7:8). — Elder Neal A. Maxwell, Ensign, November 1996, p. 21
There are some people who have supposed that if we are quickened telestial bodies that eventually, throughout the ages of eternity, we will continue to progress until we find our place in the celestial kingdom, but the scriptures and the revelations of God have said that those who are quickened telestial bodies cannot come where God and Christ dwell, worlds without end. — President George Albert Smith, Conference Report, October 1945, p. 172
It has been asked if it is possible for one who inherits the telestial glory to advance in time to the celestial glory? The answer to this question is, No! — President Joseph Fielding Smith, Doctrines of Salvation, 2:31
This is the plan of salvation. Jesus will never cease his work until all are brought up to the enjoyment of a kingdom in the mansions of his Father, where there are many kingdoms and many glories, to suit the works and faithfulness of all men that have lived on the earth. Some will obey the celestial law and receive of its glory, some will abide the terrestrial and some the telestial, and others will receive no glory. — Brigham Young, Journal of Discourses, 13:76
We are placed on this earth to prove whether we are worthy to go into the celestial world, the terrestrial, or the telestial or to hell, or to any other kingdom, or place, and we have enough of life given to us to do this. — Brigham Young, Journal of Discourses, 4:269