“There is no science of the individual, and medicine suffers from a fundamental contradiction: its practice deals with the individual while its theory grasps universals only”– O. Temkin

“The doctor does not treat ‘man’ except accidentally; he treats Callius or Socrates or someone else described in this way, who is accidentally ‘man’. So, if someone has grasped the principles of the subject without having any experience, and thus knows the universal without knowing the individuals contained in it, he will often fail in his treatment; for it is the individual who has to be treated.”– Aristotle