The world is divided into men who have wit and no religion and men who have religion and no wit.
AvicennaMedicine considers the human body as to the means by which it is cured and by which it is driven away from health.
AvicennaThe theory of medicine, therefore, presents what is useful in thought, but does not indicate how it is to be applied in practice-the mode of operation of these principles. The theory, when mastered, gives us a certain kind of knowledge. Thus we say, for example, there are three forms of fevers and nine constitutions. The practice of medicine is not the work which the physician carries out, but is that branch of medical knowledge which, when acquired, enables one to form an opinion upon which to base the proper plan of treatment.
Avicenna