In physics, matter is a difficult concept to define. In psychology, the concept of consciousness is similarly elusive.
Explanation:
Many considerable scientific theories intend to explain the way consciousness is present in our brains. But according to researchers, all of these just reduce consciousness to neural processes. It is a fact that a few of these neural processes may be necessary to create consciousness, but none represents the whole picture.
The types of Emotions that are emphasized through the author's use of the first person point of view would be Happiness, sadness, pretty much any emotion.