William Walker Atkinson 
The Law of The New Thought 
A Study of Fundamental Principles and Their Application

The New Thought is the oldest thought in existence. It has been cherished by the chosen few in all ages; the masses of the people not having been ready for its teachings. Every religion has within it certain esoteric teachings, not grasped by the many, but understood by the few — which hidden teachings contain much that is now being taught as The New Thought. Ancient writers have carefully placed bits of this esoteric truth among writings of wide circulation, knowing that only those with the key could read, and the multitude would not even suspect the existence of the grain of wheat among the chaff…. The Truth once recognized cannot be lost.