What is the author's style in Greatness Strikes Where It Pleases by Lars Gustafsson?

The story is told in the third person by a narrator who has insight into how the retarded boy and later man experiences the world. The narrator is a mature and sophisticated adult; when he needs to he uses complex sentence structures (one sentence contains 132 words), and the last six paragraphs are written in a heightened, lyrical style that enables him to convey his vision of the connection between the mentally retarded man and the infinity of the cosmos. This is a reality that the man cannot know for himself, except by some unconscious instinct.