The Arabian physicians who succeeded to the traditions of Greek medicine preserved also those relating to psychotherapy. Rhazes, the first of the great Arabian physicians, has a number of aphorisms that show his interest in and recognition of the value of mental healing. He insisted that "doctors ought to console their patients even though the signs of death are impending. For the bodies of men follow their spirits." He believed that the most important function of the physician was "to strengthen the natural vitality for, if you add to that you will remove a great many ills, but if you lessen it by the drugs which you employ you add to the patient's danger." "Truth in medicine," he said, "is a goal which cannot be absolutely reached, and the art of {14} healing, as it is described in books, is far beneath the practical experience of a skillful, thoughtful physician." Manifestly he realized the importance of the influence of the physician over the individual patient.

His greatest successor among the Arab physicians, Avicenna (eleventh century), "the Hippocrates and the Galen of the Arabians," as Whewell called him, has some striking tributes to what he recognized as the influence of the mind on the body. He appreciated that not only might the mind heal or injure its own body, but that it might influence other bodies, through their minds, for weal or woe. He says: "The imagination of man can act not only on his own body, but even on other and very distinct bodies. It can fascinate and modify them, make them ill or restore them to health." In this, of course, he is yielding to the dominant mystical belief that man can work harm to others, which subsequently, under the name of witchcraft, came to occupy so prominent a place for ill in European history. But at the same time it is evident that his opinions are founded on his knowledge of the influence of mind on body, as he had seen its action in medicine. From him we have the expression: "At times the confidence of the patient in the physician has more influence over the disease than the medicine given for it."