Evelyn Underhill was an English author, an Anglo-Catholic, well known for her numerous writings on Christian mysticism and religious practice.
Underhill was born in Wolverhampton, England and was a mystic, novelist, pacifist and metaphysical poet. She was formally educated at King's College London, where she was later elected as a Fellow. Underhill was one of the most widely read writers on the spiritual life in the first fifty years of the twentieth century, and with her book Mysticism, published in 1911, no other book of its type met with such success until Aldous Huxley's The Perennial Philosophy of 1946. An only child, her early mystical insights were described by her as "abrupt experiences of the peaceful, undifferentiated plane of reality—like the "still desert" of the mystic—in which there was no multiplicity nor need of explanation." The meaning of these experiences became a lifelong quest and source of private angst, leading to her research and writing on the subject of mysticism. Both her father and her husband were writers , London barristers and yachtsmen. She and her husband, Hubert Stuart Moore, grew up together and were married on July 3, 1907. The couple had no children. She traveled regularly to the continent, primarily Switzerland, France and Italy where she pursued her interests in art and Catholicism, visiting numerous churches and monasteries. Neither her husband nor her parents shared her interest in spiritual matters.