Elder Dallin H. Oaks of the Quorum of the Twelve spoke at the April 1986 general conference about the third of the Ten Commandments the Lord gave to ancient Israel: "Thou shalt not take the name of the Lord thy God in vain; for the Lord will not hold him guiltless that taketh his name in vain." (Ex. 20:7.)
Elder Oaks said: "This same commandment was repeated to the Book of Mormon people by the prophet Abinadi (see Mosiah 13:15) and to each of us through modern prophets. (See D&C 136:21.)"The Doctrine and Covenants gives this example:
" `Let all men beware how they take my name in their lips -
" `For behold, verily I say, that many there be who are under this condemnation, who use the name of the Lord, and use it in vain, having not authority.' " (D&C 63:61-62.)
Elder Oaks explained: "This scripture shows that we take the name of the Lord in vain when we use His name without authority. This obviously occurs when the sacred names of God the Father and His Son, Jesus Christ, are used in what is called profanity . . . .
"There are no more sacred or significant words in all of our language than the names of God the Father and His Son, Jesus Christ."