Explanation: In the given excerpt from "The Strange Case of Dr. Jekyll and Mr. Hyde" by Robert Louis Stevenson, we can see the description of Dr. Jekyll being sad and isolated in his sadness and thoughts, when Utterson finds him and expresses his concern for Dr. Jekyll's health. In this passage we can see supported the theme that hiding a secret can be painful, because it is for the burden of hiding Mr. Hyde, that Dr. Jekyll is so miserable.