因此，人的认知也可分为两部分；对客观事物进行感知，形成表象和意象、概念

Hence, human cognition can be divided into two parts; perceptual objective things, the formation of the appearance and image, the process of concept, scope and process of things relationship analysis, judgment and reasoning. Metaphor it is based on human experience, its essence lies in the understanding and perception of a thing to another thing. Due to the continuous development of new things as well as the limitations of language and the brain mechanisms of cognitive function, people usually need to known the concept of concrete things to abstract knowledge and understanding, or a new unknown. Therefore, the metaphor is an important way people perceive the world thinking.

Therefore, human cognition can also be divided into two parts, the process of perceiving objective things, forming appearances and images, concepts, categories, and analyzing, judging and reasoning the relationships of things. Metaphor is based on human experience, the essence of which is to understand and perceive another by one thing. Because of the limitations of language mechanisms and brain cognitive functions, and the development of new things, people often need to recognize and understand abstract or new unknowns through the known concepts of specific things. Therefore, metaphor is an important way of thinking for people to recognize the world.

Therefore, human cognition can be divided into two parts: the process of perceiving objective things, forming images, concepts and categories, and the process of analyzing, judging and reasoning things. Metaphor is based on human experience, and its essence lies in understanding and perceiving another thing with one thing. Because of the limitation of language mechanism and cognitive function of brain and the continuous development of new things, people usually need to recognize and understand abstract or new unknown things through the known concepts of specific things. Therefore, metaphor is an important way of thinking for people to understand the world.