There is but one Truth, and it manifests on all planes - the Spiritual; the Mental; and the Physical - and manifestations agree and coincide. So no Mentalist need fear the test of Physical Science, for each plane will bear out the facts and phenomena of the ones below or above it - the Three are but varying phases of One. In this little work we shall hug close to the plane of Physical Science, because by so doing we will be able to make the subject much clearer to many than if we had attempted to express the teaching in Metaphysical terms. There is no contradiction in the end. Each bit of Truth must dovetail into every other bit, for all are parts of the Whole. William Walker Atkinson was an attorney, merchant, publisher, and author, as well as an American pioneer of the New Thought movement. He is also known to have been the author of the pseudonymous works attributed to Theron Q. Dumont and Yogi Ramacharaka. In the last 30 years of his life he wrote more than 100 books.