They can tell the Spirit of the Lord from all other spirits

“They can tell the Spirit of the Lord from all other spirits will whisper peace and joy to their souls; it will take
malice, hatred, strife and all evil from their hearts, and their whole desire will be to do good, bring forth
righteousness, and build up the kingdom of God.” (Marion G. Romney, Conference Report, April 1944, pp. 138-141; http://scriptures.byu.edu/gettalk.php?ID=122&era=yes)