Final answer:
The theme that best connects to the excerpt is 'Living with secrets is painful'.
Step-by-step explanation:
The theme that best connects to the excerpt from The Strange Case of Dr. Jekyll and Mr. Hyde is Living with secrets is painful. The passage describes how the narrator, who is also Dr. Jekyll, is consumed by the horror and fear of his alter ego, Mr. Hyde. This shows the anguish and suffering that comes with harboring a secret identity.
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