Pagel has called attention to Mondeville's insistence on preparing the patient's mind properly for venesection. The patient should be made to feel that this procedure was sure to do him good, and various reasons should be given him why the removal of a certain amount of blood carried with it poisons from the body, and so gave a better opportunity to nature to conquer the disease. If the patients were unfavorably disposed towards venesection, Mondeville thought that it should not be performed, as it was not likely to do good. It was not that he felt that the mental influence was the more important of the two therapeutic factors, but that a combination of the remedial force of blood-letting with a favorable state of the patient's mind meant so much more than could be accomplished by venesection alone that it was worth while to take pains to have the combination of the two. We in modern times realize that in most cases blood-letting rather did physical harm than good. It continued to hold a place in medicine because patients were so much impressed by it that they were given renewed vigor after its use. MENTAL HEALING IN THE RENAISSANCE What is exemplified in medieval medicine in this matter remains true during the Renaissance. In the fifteenth century Petrus Pomponatius, well known as a thinker and writer on borderland subjects related to medicine, came to the conclusion that men might very well be cured of certain ailments {15} by influence from the minds of others, and that such treatment, undertaken by physicians appropriately endowed, produced wonderful effects. He said: Some men are specially endowed with eminently curative faculties; the effects produced by their touch are wonderful: but even touch is not always necessary; their glances, their mere intention of doing good are efficient for the restoration of health. The results, however, are due to natural causes. PSYCHOTHERAPY AND MODERN MEDICINE Paracelsus.--Paracelsus, the great physician of the first half of the sixteenth century, who may well be considered the father of modern pharmaceutics, had no illusions with regard to the exclusive power of drugs over disease. He recognized that mental influence was extremely important, and often lent a power not otherwise possessed to many remedies. He said: Imagination and faith can cause and remove diseases. Confidence in the virtue of amulets is the whole secret of their efficacy. It is from faith that imagination draws its power. Anyone who believes in the secret resources of Nature receives from Nature according to his own faith; let the object of your faith be real or imaginary, you will in an equal degree obtain the same results.