I think basically there are only two things: Facts and Illusions. Non-living entities can never have illusions and they are governed by just plain facts.And so these non-living entities can be objective and perform efficiently. For living entities, facts are still important, but illusions are what gives meaning to life.Identity is one such illusion. An historical example is the biblical theory that earth is the center of the universe. It was a comfortable idea because it gave importance to human beings as the center of creation.So what I realized after reading the essay is that one should know about differences between illusions and facts and do not get carried away by illusions to cause conflicts. Illusions are pleasant, just like good graphics in a video game (although with poor graphics also one can implement the same game logic).