| A complete cognition is a process of rational, permeated with the impact of the irrational factors as the dominant. Emotionally, opinions or belief, in cognition and practice activities always plays his role. No one can deny that people are irrational side as does not deny the existence of the rational side. Accustomed to the reason for the future or unknown there is possible to predict correctly, caused the people to worship an instinct of rational. But the rational factors also have irrational factors supplemented and coordination, irrational factors also need to rational factors guide. Only the combination of the two, complement each other to play to play to their respective advantages in the rational factors for guidance. Human’s irrational factor is different from the animal instinct, it is generated on the basis of understanding the objective world is internalized in human spiritual. Pure rational factors and irrational factor are not exist, only the full attention of irrational factors play a role in the mechanism, conditions and scope and guide it correctly, to better play its positive role. With the continuous development of science and technology and philosophy since twentieth Century, we can clearly see:understanding and changing the objective world is a process of interaction between the subject and the object, the irrational factors subject in this process itself have significant impact on the process and results of understanding. The irrational factors, both directly as intuition, inspiration and insight understanding means etc, also have psychological feelings, will and belief content. In fact, it is because of the person different from other animal are not irrational factors, which makes the objective world know more accurate and perfect, and grasp the essence and law of objective world. Therefore, the essence of cognitive activity is based on rational dominated both irrational characteristic behavior. So, we study the human cognition, rational factors cannot be confined to the study of human nature, should also be irrational factors of human and awareness activities can play a role in. But the human rational philosophy to study and explore the ancient Greek philosophy to drop, the thousands of years of history, compared with human philosophy, research on the irrational but not rich and full, so the role of irrational factors, also have the necessary value. |