personal being with whom human beings could interact. He wrote in The Trail of Life in the Middle Years, "The essential characteristic of [mysticism] is the attainment of a personal conviction by an individual that the human spirit and the divine Spirit have met, have found each other, and are in mutual and reciprocal correspondence as spirit with Spirit." At the same time that he distinguished between negative and affirmative mysticism, he asserted that all negative mystics occasionally take the affirmative approach and that all affirmative mystics tread the negative path from time to time. He exerted a major influence on the life and work of theologian Howard Thurman, who studied with him from 1929–1930. Jones was a member of the Laymen's Commission that toured mission fields in Asia and produced Re-Thinking Missions: A Laymen's Inquiry after One Hundred Years (1932). The conclusions of this inquiry reflect his views as outlined above. Jones died in 1948 at age 85, in Haverford, Pennsylvania. Bibliography Books Eli and Sybil Jones: Their Life and Work. Philadelphia: Porter & Coates, 1889. Practical Christianity. Philadelphia: John C. Winston & Co., 1899. The Society of Friends in Kennebec County, Maine. New York: H.W. Blake & Co., 1892. A Dynamic Faith. London: Headley Brothers, 1901. Fourth edition. London: Headley Brothers, 1920. Social Law in the Spiritual World: Studies in Human and Divine Inter-Relationship. Philadelphia: John C. Winston Co., 1904. Practical Christianity, new and enlarged edition. Philadelphia: John C. Winston Co., 1905. The Double Search: Studies in Atonement and Prayer. Philadelphia: John C. Winston Co., 1906. The Abundant Life, 1908. Studies in Mystical Religion. London: Macmillan and Co., 1909. Second edition. London: Macmillan and Co., 1919. Stories of Hebrew Heroes. Illustrated by George Soper. London: Headley Brothers, 1911. The Quakers in the American Colonies. London: Macmillan and Co., 1911. A Boy's Religion from Memory. Philadelphia: Ferris & Leach, 1913. Spiritual Reformers in the 16th and 17th Centuries. London: Macmillan and Co., 1914. The Inner Life. New York: The Macmillan Company, 1916. Second edition. New York: The Macmillan Company, 1917. St. Paul the Hero. New York: The Macmillan Company, 1917. The World Within. New York: The Macmillan Company, 1918. The Story of George Fox. New York: The Macmillan Company, 1919. A Service of Love in War Time: American Friends Relief Work in Europe, 1917-1919. New York: The Macmillan Company, 1920. The Remnant. London: The Swarthmore Press, 1920. The Later