The more Kai went up, the more the images of him sitting on that table reading a book made him frown. This sudden lack of change made him realize that he indeed spent a very long time alone, simply reading and doing nothing else.
He understood that his life up until that point was akin to that of a doll rather than a human being. He believed that by reading books, he was going against his father and what he wanted to do with him.
However, when he saw that monotonic life, that lack of color in his life, he understood that he was simply doing the opposite. He was killing his own interest in life by simply doing one single thing again and again and again with no end.
After a few more floors of the same picture, he finally reached the point where he met Aria. He could see that the gloomy effect on the images had started disappearing and it started going back to the brighter light.
