It has been indicated already that the first great difficulty experienced by a medical man, in discussing such a treatment as Spiritual Healing, is the definition of terms. Accustomed to deal with more or less concrete facts, a doctor has some sort of mental picture of an infectious disease, as the reaction of the physical body to the invasion of a germ or its poison; he can see and feel a tumour, and determine its relation to anatomical structures, though he may not know as yet the cause of its growth; he has learnt by experience the results of the removal of new growths. In the region of the mind also he has investigated many phenomena; he is able to attribute many insane states to toxic influences; he has studied to some extent diseases known as ‘functional’--a class that is becoming numerically less with the advance of knowledge; but he is not able to grasp to the same extent the meaning of the word ‘Spirit.’ The medical man recognises in many cases the influence of the temperament or character of the patient upon the course of the disease, and would prefer to treat one who takes a hopeful view of the future; just as he desires quiet cheerful surroundings, and the avoidance of conditions that tend to irritate or depress. In so far as the ‘Spiritual’ attitude of the patient conduces to his peace of mind, its assistance would be welcomed by every practitioner of the healing art. But to regard this ill-defined attitude as not only influencing the character of the patient, but also as having a direct effect on all the ailments to which the body is subject, is a view that can hardly be accepted so readily. For example, it would seem to be inconceivable that Spirit could have the slightest influence on a parasitic skin disease such as ringworm. This is an instance of a simple ailment due to a local extrinsic cause. Numerous other conditions might be mentioned, such as congenital malformation, aneurysms, valvular affections of the heart, and strangulated hernia in which curative influence of the Spirit is difficult to imagine. Even if a single well-authenticated miracle in a case of any of these affections could be produced, we should still be met by many difficulties; such as the question why a solitary sufferer, possibly not highly distinguished for his spiritual attributes, should be selected for the manifestation of this power. And all rational people would admit that the occurrence of such a miracle in a case of strangulated hernia would not justify other patients in postponing operation in the hope of a repetition of this bloodless cure. Thus there are limitations to the field of operation of Spiritual Healing.