The self, in the form of consciousness, utilizes conceptual categories (or "transcendental rules") such as substance, cause and effect, unity, plurality, possibility, necessity, and reality to construct an orderly and "objective" world that is stable and can be investigated scientifically. Through perception or sense experience, understanding the reasoning we can grasps least idea about the transcendental self. These faculty of human mind/self-there brought an awareness on the existence of the self.