Based on my point of view I would think of it as Kevin showing his compassion for his father, or trying to show a link for family care.
And no, I don't think it has anything to do with Kevin being a little thief. XD Unless that's what the story portrays.
Answer: For, there is nothing more important and more essential that the original self.
It makes the listener see and visualize what is actually going on. It can also be a very key part in a essay or speech
