Answer:
It contrasts the fear he feels about becoming Hyde with the peace he feels when safe at home.
Step-by-step explanation:
The letter of Dr. Jekyll helped to show the reader of the challenges he encountered and his utmost fear which he feels whenever he transform into Hyde. This is because of the brute force which he exhibit and the destruction associated with it in direct comparison to when he is his normal self as a doctor and at the comfort of his home.