Ellen G. White (1827-1915) was a prolific author and a co-founder of the Seventh-day Adventist Church. She is considered by Seventh-day Adventists to have been a messenger of God. Born Ellen Gould Harmon in Gorham, Maine, she, along with her family, became involved in the Millerite advent movement of the 1840s. After the "Great Disappointment" of 1844, when Jesus did not return as expected, she began receiving what she believed were visions and dreams from God. Together with her husband, James White, and their contemporary Joseph Bates, she was instrumental in the founding and organization of the Seventh-day Adventist Church. Her literary output was vast, totaling approximately 100,000 pages. Her writings cover a wide range of subjects, including theology, education, health, and practical Christian living. A central theme in her work is the "Great Controversy," which describes the cosmic conflict between Christ and Satan. Within the Seventh-day Adventist Church, her writings are held in high regard as a source of inspired counsel and guidance. They are not considered a substitute for the Bible, but rather a "lesser light" intended to lead people to the Scriptures. Her influence continues to be significant, and in 2014, *Smithsonian* magazine named her one of the "100 Most Influential Americans of All Time."