The Wing Of Human Cognition

This thesis is going to mainly discuss with the irrationality and its function in human cognition as a topic and enclose the irrationality problem within western philosophy which infers to the performance of irrationality in western philosophy and cognitive study to it so as to carry on a series of analysis to illustrate the essence, characteristic, producing mechanism and the function of irrationality in human cognition.Human spirit is composed of rationality and irrationality in regard to the integrity. A real and integrated person is a unification of rationality and irrationality, body and soul, intellect and emotion. Because this two parts depend on and replenish each other mutually, the human spirit develops in full scale. From the development process of human spirit, it can be called both as the development history of rationality and irrationality. However, the unification of rationality and irrationality of human spirit is one thing, and people's cognition to it is another thing.From the philosophy history, since Scocrates put forward to"to cognition yourself",people have been cognized"human",whereas nobody cognize oneself and the function of the unification of rationality and irrationality. People either emphasize the function of rationality and degrade the function of irrationality or lay particular emphasis on irrationality to use it to cover rationality. As Engels mentioned in Natural Dialectics:"We should not sacrifice one but to flatter the other up high sky . We should use each where it should be .To arrive at this, we must pay much attention to the correlation mutual replenishment between them.."We can regard Engels'words as our guiding ideology in studying irrationality problem.