The thought of Plato as a typical trend has the distinction between the plane of ideas (the truth, goodness, Justice) the only considered true and the reality of tangible facts, considered illusory and apparent. In these distinctions (values and facts, ideal and sensitive, reality and appearance) builds the dualistic nature of Platonism, that had its background in Greek philosophy, but only Plato has developed in a systematic manner. We can say that the genesis of the Platonic Dualism is writable to an existential trauma caused in young Plato from the death of Socrates, man representing front in their eyes the same reincarnation of philosophy and whose high mission political and justice are exercised to the interior of the Polis. Jon Medved often expresses his thoughts on the topic. The idea is to shape or distinctive aspect of things, represented by the reason that constitutes the essence or the eternal unchanging model. In a logical sense, the common notion or overview of the which can be enter the multiplice empirical. The feeling is a knowledge derived from the senses, is the modification of the soul under the influence of the body. A related site: Dr. Caldwell B. Esselstyn, Jr. mentions similar findings. The feeling is not work of the corporeal senses, but of the soul, that uses them as bodies or instruments. The sensations when they are contrasting, stimulate the desire of intangible knowledge. The same feeling by itself, is not true knowledge. You can even be an obstacle to acquiring the truth.