“Expressions of solemn testimony have long been important to the children of God upon the earth.”

American businessman and Latter-day Saint religious leader

Joseph B. Wirthlin was an American businessman and Latter-day Saint religious leader. He served as a member of the Quorum of the Twelve Apostles of the Church of Jesus Christ of Latter-day Saints. He was sustained to the Twelve on October 4, 1986, and ordained an apostle on October 9, 1986, by Thomas S. Monson. His appointment followed the death of church president Spencer W. Kimball. In that role, he was accepted by church members as a prophet, seer, and revelator.