Morris married Emma Ramsey (1878–1964) on June 29, 1905; they had three daughters: Marian, Margery, and Helen.

[2] From 1935 to 1937, Morris was the First Assistant to Albert E. Bowen, the Superintendent of the Young Men's Mutual Improvement Association (YMMIA).

In 1937, when Bowen became a member of the Quorum of the Twelve Apostles, Morris succeeded him as YMMIA Superintendent.

Morris became a general authority of the LDS Church on October 6, 1951, when he was appointed an Assistant to the Quorum of the Twelve Apostles.

Morris was the oldest person in church history to become an apostle and a member of the Quorum of the Twelve.