A Functional Survey of Plato's Concept of "Idea" Also a Comment on Heidegger's Critique of the Concept

Analyzes the underlying functions of human being's reason as embodied in Plato's concept of Idea, such as cognition, constitution and valuation, then illustrates Heidegger's critiques of the concept and discusses the limitations on the logical reasoning process as shown in his critiques. A conclusion is thus drawn that the reason paradox which humans are facing to at present lies just in that they fail to understand fully the implication of reason. It follows that we should examine further the concept of reason so as to come to a life of real reasonableness.