“Satan is evil: totally and always. He ever seeks to defeat the gospel plan and ‘destroy the souls of men.’ (D&C 10:27.) …
“Satan is irrevocably committed to countering and overcoming the influence of the Spirit of Christ upon men.”
(in Conference Report, Apr. 1971, p. 24; or Ensign, June 1971, p. 36).
Mormon said that Satan stirs people up “to do iniquity continually” (Helaman 16:22).