Christian D. Larson (1874-? ) was a New Thought leader and teacher, as well as a prolific author of metaphysical and New Thought books. He is credited by Horatio Dresser as being a founder in the New Thought movement. Many of Larson's books remain in print today, nearly 100 years after they were first published, and his writings influenced notable New Thought authors and leaders, including Religious Science founder, Ernest Holmes. Larson during his life was honorary president of the International New Thought Alliance and lectured extensively during the 1920s and 1930s. He developed the Optimist Creed in use today by Optimist International, better known as the Optimist Clubs. His works include: Mastery of Self (1907), On the Heights (1908), The Ideal Made Real; or, Applied Metaphysics for Beginners (1912), and Your Forces and How to Use Them (1912).