Discussion of any subject itself dictates when that the...

Discussion of any subject itself dictates when that the method should be appropriate to that subject.

For example, today, when a researcher wishes to discuss and carry out research of a particular disease, he selects a particular methodology, makes a survey of the symptoms and effects of the disease and its treatment, and recommends that a number of patients suffering from that particular disease should be placed under observation and subjected to various clinical tests of their tissues, blood, urine etc.

and analysed to prepare a scientific table in order to diagnose the peculiarities of that disease and the manner of its treatment, and identify the bacterial factors and establish the cause of infection.

Today if someone wishing to establish the symptomology of the disease and arrive at a diagnosis, instead of employing the necessary means such as well-equipped laboratories and hospitals, statistical data, and experiments on animals and human beings, declared that for the diagnosis he has decided to proceed by conducting a nightly study of the stars for forty nights past midnight to discover the symptoms and cause of illness and the procedure for treatment of that disease, he will be made fun of in the scientific circles.

He would be told that in choosing this course, even if he went to a well-equipped observatory to study the movement of the stars, their form, and how they rise and set, such activities and thoughts would not bear even the slightest effect on the patient, or the cause of his disease, on an its effects nor its treatment.

Or if he were to declare that for the purpose of studying this matter he had decided to place an astrolabe in front of him and in accordance with special signs and calculations provided by the astrolabe and even computing by the art of arithmetical numbers, he will discover the cause and effects of that disease and its cure, again science would laugh at him, and say to him: To identify a disease as far as human intellect has been able to establish requires that a study of the patients be made and laboratory tests and experiments be conducted and their results compared in order to diagnose that disease.