Rev. 20:13; Psalm 16:10; Acts 2:27; D&C 76:81, 84, 106; refer in this text to Alma 40:13-14
“… many other great truths not known before, have been declared to the people, and one of the greatest is that to hell there is an exit as well as an entrance. Hell is no place to which a vindictive judge sends prisoners to suffer and to be punished principally for his glory; But it is a place prepared for the teaching, the disciplining of those who failed to learn here upon the earth what they should have learned… . No man will be kept in hell longer than is necessary to bring him to a fitness for something better. When he reaches that stage the prison doors will open and there will be rejoicing among the hosts who welcome him into a better state.” (James E. Talmage, Conference Report, Apr. 1930, p. 97)
“What is Hell? It is another modern term, and is taken from Hades. Hades, the Greek, or Sheol the Hebrew, these two significations mean a world of spirits. Hades, Sheol, paradise, spirits in prison, are all one: It is a world of spirits. The righteous and the wicked all go to the same world of spirits until the resurrection.” (Teachings of the Prophet Joseph Smith, p. 310)