How does Dorian Gray's outlook on the world change throughout the novel?

Throughout the novel, Dorian Gray's outlook on the world changes fairly drastically.  At the beginning of the story, Dorian is young and easily influenced.  He is beautiful, which makes him the perfect subject of a portrait by artist Basil.  Basil uses Dorian as a muse, and introduces him to Lord Henry.  Under Lord Henry's influence, Dorian learns that he can get away with a lot because of his beauty, and he also begins to feel that life is meant to be lived by taking what you want.  

This hedonistic world view causes Dorian to make a declaration that he would sell his soul to stay young and beautiful forever.  Dorian later learns that his fate has been tied to Basil's portrait of Dorian, leaving Dorian free to explore a world of excess and pleasure with no physical repercussions.   Dorian, throughout the rest of the novel, becomes increasingly hedonistic and arrogant, and he is constantly finding new ways to entertain himself.  He believes that the world owes him constant entertainment.