A complicated piece by Greek Plato, Allegory of the Cave describes the psych of mankind. He describes how humans are like prisoners inside a cave. They are unable to turn their heads, and all they see is the shadow upon a wall. Plato correlates the human general process is to think and speak without any awareness of extra knowledge. The setting describes how puppets are placed behind the prisoners casting an image for them to comprehend.
The images would provide an answer human's awareness. How can one describe he can't see? Worse, how can one describe something he doesn't understand? Plato advocates reflective understanding in this essay. To do so, one must realize their errors by facing realism, as the prisoners do by turning their heads. Plato teaches how humans would likely to acquire knowledge and concepts by its physical properties and appearances; we would be mistaken if we levied the concept, knowledge, and grasp of one object by the same level.
Reading this essay by Plato teaches the philosophies and concepts of life. There could be many different opinion and perspective on any given topic due to our concept and knowledge. This is the reason for our differences. While differences can be positive, it can also have a negative effect. I like this essay to a certain extent; I believe the awareness of mankind also has to take personal experience into consideration. I believe experience is also a major contribution to human concepts and knowledge.