One of the original twelve apostles in the early days of the Latter Day Saints Movement.
In his early 20s, out of curiosity he decided to attend a sermon of the The LDS Church; he heard the gospel and less than a year later joined the church.
After Joseph Smith's murder and the Mormon exodus from Illinois, he helped to create the plan for their migration to Utah.
He married Vilate Murray in 1822; he was 21 at the time.
He was a close friend and counselor to Smith's successor, Brigham Young.