Study of Medicine - Rambam

 Rambam (Shemoneh Perakim 5:03) The study of medicine has a very great influence upon the acquisition of the virtues and of the knowledge of God, as well as upon the attainment of true, spiritual happiness. Therefore, its study and acquisition are preeminently important religious activities, and must not be ranked in the same class with the art of weaving, or the science of architecture, for by it one learns to weigh one's deeds, and thereby human activities are rendered true virtues. The man who insists upon indulging in savory, sweetsmelling and palatable food although it be injurious, and possibly may lead to serious illness or sudden death ought, in my opinion, to be classed with the beasts. His conduct is not that of a man in so far as he is a being endowed with understanding, but it is rather the action of a man in so far as he is a member of the animal kingdom,