"... Take, for instance, the gift of tongues; years ago in this Church you could find men of age, and seemingly of experience, who would preach and raise up Branches, and when quite young boys or girls would get up and speak in tongues, and others interpret, and perhaps that interpretation instructing the Elders who brought them into the Church, they would turn round and say, '"I know my duty, this is the word of the Lord to me and I must do as these boys or girls have spoken in tongues.'" You ask one of the Elders if they understand things so now, and they will say, '"No, the gifts are from the Lord, and we are agents to use them as we please.'" If a man is called to be a Prophet, and the gift of prophecy is poured upon him, though he afterwards actually defies the power of God and turns away from the holy commandments, that man will continue in his gift and will prophecy lies. He will make false prophecies, yet he will do it by the spirit of prophecy; he will feel that he is a prophet and can prophecy, but he does it by another spirit and power than that which was given him of the Lord. He uses the gift as much as you and I use ours. The gift of seeing with the natural eyes is just as much a gift as the gift of tongues."
[Journal of Discourses. Liverpool, England, 1853-86. 3:362-375, in The Complete Discourses of Brigham Young, Ed. Richard S. Van Wagoner, Smith-Pettit Foundation, Salt Lake City (2009), http://bit.ly/BY-discourses]