When Ellen Gould Harmon White (1827-1915) was 17, she received a message from God in the form of a vision. It was the first of some 2,000 visions White experienced in her lifetime. The visions formed the basic teachings of the Seventh Day Adventist Church, which White and her husband co-founded in 1863. White served as the church's spiritual leader throughout her life. She wrote 26 books based on her visions, led a health reform movement, and established schools and sanitariums.