explain the irony in the following lines and how it adds more humor to the text: "he had done his best to commit his murder, but on both occasions he had failed, and through no fault of his own. he had tried to do his duty, but it seemed as if destiny herself had turned traitor. he was oppressed with the sense of the barenness of good intentions, of the futility of tryinh to be line" -Lord Arthur Savile's Crime