David O. McKay got to be the 9th Prophet and President in the history of Mormonism. David O. McKay was born on August 8th, 1873 in Huntsville Utah. David got to be the class president when he went to the University of Utah. David O. McKay was of the Mormonism faction his whole life and went on one mission. This mission was to Great Britain. He later married Emma Ray Riggs on January 2, 1901. He still had other service opportunities than his mission such as a church commissioner of education and some others. One of the jobs David O. McKay did was being the principal of the Weber State Academy. David O. McKay became an apostle on April 9, 1906. He later became the second counselor to two prophets. Heber J. Grant and George Albert Smith. Then he became the president of the Quorum of the 12. In 1951 David O. McKay was ordained Prophet, Seer, and Revelator, and President of the Church. President McKay Dedicated 5 temples and BYU Hawaii. On January 18, 1970 at the age of 96 President David O. McKay met his death in Salt Lake City Utah.
A really great quote I found from him is, "Every member a missionary!" This is still told in general conference. A testimony from him as well is, "The gospel, the glad tidings of great joy, is the true guide to mankind; and that man or woman is happiest and most content who lives nearest to its teaching, which are the antitheses of hatred, persecution, tyranny, domination, injustice-things which foster tribulation, destruction, and death throughout the world. What the sun in the heavenly blue is to the earth struggling to get free from winters grip, so the gospel of Jesus Christ is to the sorrowing souls yearning for something higher and better than mankind has yet found on earth.
Talk about more if interested at Mormon.org/chat