Then he continues...
Then he continues: When Hippocrates died, he left behind children and pupils from the clan of Asclepios and other clans. Medicine continued to be transmitted from those physicians to those whom they taught, until the time of the appearance of Galen. The noteworthy physicians in the interval between Hippocrates and Galen are quite a few.
After mentioning Hippocrates and Galen, who supported experience together with analogy, Ishaq refers to methodism as follows: Among them there was one who held a different opinion and composed books on the procedures of methodism in the craft of medicine. He wanted to corrupt the people and to lead them away from the belief in analogy and experience. Some physicians continued to accept methodism, and others did not, until Galen appeared.
He disapproved of methodism, destroyed it, burned the books that existed on it, and invalidated that technique. As mentioned above, in the 3rd/9th century, scholars and physicians paid special attention to these three sects and their arguments. What was agreed upon was that experience and analogy should be used together to solve medical issues and that each one alone was not valid. This point has been made clear by Ibn Abi Sadiq Nishaburi (fl.
5th/ 11th century) in his "Commentary on Hippocrates's Aphorisms". In connection with the first aphorism, that is "Life is short, and art is long, the occasion fleeting, and experience is dangerous and analogy is difficult" (al ‑ `umr qasir wa al ‑ sina`ah tawilah wa al ‑ waqt dayyiq wa al-tajribah khatar wa al ‑ qada ‘asir) , Ibn Abi Sadiq comments that if experience is not based on analogy and not founded on a principle and rule it can be very dangerous.
On the other hand, analogy, which is difficult in itself, cannot be used as a source for other arts, without the help of experience. The most comprehensive account on the medical sects is given by the Iranian physician Ibn Hindu of Qumm (d. 420/1029) in his book entitled "The Key to the Science of Medicine" (Miftah al ‑ tibb) .
The sixth chapter of Miftah al ‑ tibb is devoted to the medical sects, a summary of which is as follows: Each of the various medical `sects' has its own particular view and method in recognizing illness and treating it. The physicians agree that the goal of medicine is to confer the benefit of health; that is, to give health to sick persons. On the method of obtaining the things which are beneficial to health, however, they differ.