Some time after his healing, Atkinson began to write articles on the truths he felt he had discovered, which were then known as Mental Science. In 1889, an article by him entitled "A Mental Science Catechism," appeared in Charles Fillmore's new periodical, Modern Thought. By the early 1890s Chicago had become a major centre for New Thought, mainly through the work of Emma Curtis Hopkins, and Atkinson decided to move there. Once in the city, he became an active promoter of the movement as an editor and author. He was responsible for publishing the magazines Suggestion (1900-1901), New Thought (1901-1905) and Advanced Thought (1906-1916). In 1900 Atkinson worked as an associate editor of Suggestion, a New Thought Journal, and wrote his probable first book, Thought-Force in Business and Everyday Life, being a series of lessons in personal magnetism, psychic influence, thought-force, concentration, will-power, and practical mental science.