In chapter ten, in Jekyll’s letter, he says that “there was something strange in [his] sensations, something indescribably new and, from its novelty, incredibly sweet” (Stevenson 44). Previously, he stated that the drug had the potential to kill him. Dr. Jekyll knows how incredible this drug makes him feel and he does not want to give that up, even if that means giving up his life as well. Also in chapter ten, while Dr. Jekyll is at the park, he had a “vainglorious thought” (Stevenson 50) and transformed into Mr. Hyde. Mr. Hyde’s thoughts are taking over the way that Jekyll thinks by converting the kind and caring thoughts into evil and devilish thoughts. Hyde is interfering with Jekyll’s calm and collective thoughts with his evil and destructive thoughts. Dr. Jekyll is starting to not be capable of his own thoughts and not being able to make appropriate