The Picture of Dorian Gray help me with homework: the protagonist appears to have

In Oscar Wilde’s The Picture of Dorian Gray, the protagonist appears to have stumbled onto a way of sinning without suffering the consequences, since his decadence changes his portrait without changing him. According to the three major characters in the story, is it possible to sin without consequences? What about the author’s perspective on the subject? Use details from the novel to support your answer.