It has already been seen that before and during the early centuries of the Christian era the secrets and learning of the physicians tended to pass gradually into the hands of the priests. It was so in the temples of ancient Greece, it was so in Alexandria, it became so in Rome, it has been so even{052} in modern times, although only for brief periods of time. This has come about in some measure from the cupidity of the clerical orders, partly because it required a certain amount of intelligence and knowledge to become a priest, and partly because, owing to ignorance, credulity, and superstition, diseases have at all times been regarded by the ignorant as evidence of divine wrath and chastisement, or of diabolical or occult influences, rather than the effect of natural causes. Hence men have turned ever toward prayers, exorcism, and expiation, especially when exhorted thereto by the priests. This has been the sacerdotal aspect of the practice of medicine in all times, and when the priests have usurped therapeutic functions they have done harm rather than good. So long as theology and science work hand in hand, each redounds to the credit of the other, but always in the history of man when theology has appropriated that which did not belong to it it has brought ridicule upon itself and has delayed the progress of knowledge. There have been frequent rebellions against religious authority in ancient as in modern times. For instance, at the commencement of the fifth century before Christ the Pythagoreans were dispersed, and the doctrines of Cos and Cnidus--i.e. the Hippocratic teachings--were promulgated; and again, in the course of events, when the descendants of Æsculapius became servile attendants at the temple and adjuncts to the priesthood or a part of it. At first, in Alexandria, the physicians were supreme; their disciples, however, had the same blind reverence for authority that too many workers in the field of theology have evinced, and men once more practiced medicine on the traditions of the past, and in so doing allied themselves more and more to the temples in Rome. At first, the oldest and best instructed of the relatives treated the diseases of his family as he understood them; simply shared this duty with its other members. Cato, the censor, was much engrossed with this domestic medicine;{053} he wrote a book in which he recommended cabbage as a sovereign remedy in many diseases. He venerated the number 3, as did the Pythagoreans; did not disdain to transmit to posterity certain medical words which it was believed should be repeated to assist in the reduction of dislocations and fractures. This old censor seemed to have a profound hatred for medical men, and most absurd ideas of their works and claims, although doubtless many Greek physicians who came to Rome merited the invectives which he launched against them. Then came Asclepiades, of Bythinia, as already mentioned, whose talents were far superior to those of his Roman