Doctrine and Covenants Lesson #37
This lesson emphasizes the need for order in the Church, and thus only one person is authorized to pronounce revelations directed to the whole Church. Just as the Prophet-President is responsible to give instruction to Church members, members are responsible for heeding that instruction.
"Why Do We Need Prophets?" Dieter F. Uchtdorf, Ensign March 2012
"God loves all His children. That is why He pleads so earnestly with us through His prophets. Just as we want what is best for our loved ones, Heavenly Father wants what is best for us. That is why His instructions are so crucial and sometimes so urgent. That is why He has not abandoned us today but continues to reveal His will to us through His prophets. Our fate and the fate of our world hinge on our hearing and heeding the revealed word of God to His children." Find more conference talks about the role of prophets, seers, and revelators here.
The need for only one person to be the voice of authority in pronouncing revelation for the whole church is evident. Here is the background to Hiram Page's claim to revelation and Doctrine and Covenants 28 and 43.
"Latter-day Saints believe that there is need for revealed knowledge from God to direct the affairs of the Church and provide insight into God's will today just as there was anciently. Revelations to the President of the Church may include declaration or clarification of doctrines or direction concerning theological issues, organizational matters, moral conduct, and practical administration. The unity of the Church worldwide is enhanced by the prophet of the Church as God's spokesperson. . . .The position or calling of President of the Church has developed together with the organization of the Church as a whole."
Video: Special Witnesses of Christ, with Gordon B. Hinckley, Thomas S. Monson, James E. Faust, and the members of the Quorum of the Twelve Apostles
"This one-hour program features members of the First Presidency and Quorum of the Twelve Apostles of The Church of Jesus Christ of Latter-day Saints bearing personal testimony of the Savior's divine mission." (2003)