Elder Dallin H. Oaks of the Quorum of the Twelve Apostles spoke about the Final Judgment and the condition of cleanliness we must achieve:
“Many Bible and modern scriptures speak of a final judgment at which all persons will be rewarded according to their deeds or works or the desires of their hearts. But other scriptures enlarge upon this by referring to our being judged by the condition we have achieved.
“The prophet Nephi describes the Final Judgment in terms of what we have become: ‘And if their works have been filthiness they must needs be filthy; and if they be filthy it must needs be that they cannot dwell in the kingdom of God’ (1 Nephi 15:33; italics added). Moroni declares, ‘He that is filthy shall be filthy still; and he that is righteous shall be righteous still’ (Mormon 9:14; italics added; see also Revelation 22:11–12; 2 Nephi 9:16; Alma 41:13; D&C 88:35). The same would be true of ‘selfish’ or ‘disobedient’ or any other personal attribute inconsistent with the requirements of God. Referring to the ‘state’ of the wicked in the Final Judgment, Alma explains that if we are condemned by our words, our works, and our thoughts, ‘we shall not be found spotless; … and in this awful state we shall not dare to look up to our God’ (Alma 12:14)” (in Conference Report, Oct. 2000, 41; or Ensign, Nov. 2000, 32).
President Gordon B. Hinckley used the example of pornography to teach this same principle when he said: “Let any who may be in the grip of this vise get upon their knees in the privacy of their closet and plead with the Lord for help to free them from this evil monster. Otherwise this vicious stain will continue through life and even into eternity. Jacob, the brother of Nephi, taught, ‘And it shall come to pass that when all men shall have passed from this first death unto life, insomuch as they have become immortal, … they who are righteous shall be righteous still, and they who are filthy shall be filthy still’ (2 Nephi 9:15–16)” (in Conference Report, Oct. 2004, 66; or Ensign, Nov. 2004, 62).