These three, Messrs. Evans and Dresser and Mrs. Eddy, proved to be Quimby's most famous patients and disciples. Evans became a noted and voluminous writer on mental healing, Mr. Dresser has been identified with the New Thought movement of which his son H. W. Dresser is probably the best exponent, and Mrs. Eddy ruled the Christian Scientists with a rod of iron. Warren F. Evans visited Quimby twice in the year 1863, and at these times obtained his knowledge of Quimby's methods. Up to this time he had been a Swedenborgian clergyman, and his beliefs enabled him the better to grasp the new doctrines. On the occasion of the second visit he told his healer that he thought he could cure the sick in this way, and Quimby agreed with him. On returning home he tried it, and his first attempts were so successful that he became a practitioner, using only mental means, and continued in this work. He wrote several books on the subject of mental healing, the first one, _The Mental Cure_, appearing in 1869, six years before Mrs. Eddy's _Science and Health_. Perhaps, strictly speaking, the New Thought movement does not come within the scope of our subject, except as we see in it an outgrowth and application of the Quimby doctrine, for two reasons. In the first place, its purpose is mental hygiene rather than cure, and it is all the more valuable for that. Of course, in establishing hygienic practices many disorders are cured, but prevention is the main feature. The second reason why we might perhaps not include it in a resume of the healers is that it is intended to be for the use of the individual to prevent his employing a healer of any kind. The same objection, however, would do away to some extent with a discussion of Christian Science. The principles of New Thought are that the mind has an influence on the body, and that good, sweet, pure thoughts have a salutary effect, but the opposite ones injure the body. Don't worry, don't think of disease, don't look for trouble, but fill the mind with the opposite positive thoughts and life will be happy and the body will be well. The doctrines are expounded differently by the various leaders, and emphasis is laid on different points, some emphasizing more fully the religious aspects of the movement, for example. The principal writers on the subject are H. W. Dresser, R. W. Trine, H. Wood, and H. Fletcher.