“There are many things in the Bible which do not, as they now stand, accord with the revelations of the Holy Ghost to me.”Joseph Smith, Jr, Teachings of the Prophet Joseph Smith, p.310.
“But even if we or an angel from heaven should preach a gospel other than the one we preached to you, let him be eternally condemned.” (Gal. 1:8)
“...for Satan himself masquerades as an angel of light.” (2 Cor. 11:14)