William Walker Atkinson 
Thought-Culture, or, Practical Mental Training 

Excerpt: "Thought-Culture in general will do much for the Imagination, for the very processes employed in the development and cultivation of the various other faculties of the mind will also tend to bring the Imagination into subjection and under control, instead of allowing it to remain the wild, fanciful irresponsible faculty that it is in the majority of cases. Use the faculty of Imagination as a faculty of Thought, instead of a thing of Fancy. Attach it to the Intellect instead of to the Emotions. Harness it up with the other faculties of Thought, and your chariot of Understanding and Attainment will reach the goal far sooner than under the old arrangement. Establish harmony between Intellect and Imagination, and you largely increase the power and achievements of both."