Jacob 6:10; Mosiah 2:38-39; 3:27; Alma 12:17; 36:12-16; Morm. 9:5; Teachings of the Prophet Joseph Smith, pp. 310-311, 357; Answers to Gospel Questions, Smith, 2:210; Life Beyond, Millet, pp. 21-22
“This fire and brimstone, we are informed, is a representation of the torment which shall be suffered by the wicked. It is not actual fire, but it is the torment of the mind.” (Joseph Fielding Smith, Doctrines of Salvation, 2:224)
“A man is his own tormenter and his own condemner. Hence the saying, They shall go into the lake that burns with fire and brimstone. The torment of disappointment in the mind of man is as exquisite as a lake burning with fire and brimstone. I say, so is the torment of man.” (Teachings of the Prophet Joseph Smith, p. 357)