Phineas Parkhurst Quimby (February 16, 1802 – January 16, 1866) was an American clockmaker, mentalist and mesmerist. His work is widely recognized as foundational to the New Thought spiritual movement
One of his sons was a follower and strong defender of him, working to differentiate his work from that of Mary Baker Eddy, a patient who later founded Christian Science. His son worked from his father's writings, which were mostly not released until the 1920s, after the son's death.
Among the people who claimed to be cured by Quimby were Julius Dresser and his wife Annetta Dresser, from what sickness it is unclear. Their son, Horatio Dresser, wrote extensively on Quimby's theories. He edited and collected many of Quimby's papers in his book Health and the Inner Life: An Analytical and Historical Study of Spiritual Healing and Theories (published before 1923; reissued as 2009 paperback by Forgotten Books). He also edited and published Quimby's papers in the book, The Collected Manuscripts of P.P. Quimby (1921; reprinted in 2008 paperback as The Quimby Manuscripts by Forgotten Books).
Barry Morton, a scholar of faith healing, has said that Quimby's constant practice of his mind cure method led him to make important discoveries related to curing psychosomatic illnesses. Although Quimby did not publish his findings, he trained many others in his methods. In effect, he started a "gnostic" healing tradition. Some of his methods were adopted by John Alexander Dowie, who revolutionized Christian faith healing in the 1880s.
Warren Felt Evans was one of the first individuals who wrote seriously on the teachings of Phineas Quimby
Mary Baker Eddy, the founder of Christian Science, was a patient of Quimby's for a short time. Later, claims were made that she was at least partially inspired by Quimby in her theology. However, both Quimby's son and Christian Scientists have pointed out major differences between Quimbyism and Christian Science. Biographer Gillian Gill and others agreed, pointing out that because of its theism, Christian Science differs considerably from the teachings of Quimby, who did not base his work in religion.