illustration of a face with two separate halves, one good and one evil, located above the fumes of a potion

The Strange Case of Dr. Jekyll and Mr. Hyde

by Robert Louis Stevenson
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How is the relationship between Dr. Jekyll and Mr. Hyde important to the theme of duality?

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The relationship between Dr. Jekyll and Mr. Hyde is integral to the theme of duality. When we discover that they are the same person—that is, that Dr. Jekyll transforms into Mr. Hyde—we understand the point that Robert Louis Stevenson is trying to make about the duality within us.

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The relationship between Dr. Jekyll and Mr. Hyde is integral to the theme of duality. When we discover that they are the same person—that is, that Dr. Jekyll transforms into Mr. Hyde—we understand the point that Robert Louis Stevenson is trying to make about the duality within us.

The two personas have different appearances and different personalities. They are so different that they are essential opposites of each other. Their opposite nature develops the idea of having two opposite sides to oneself.

Hence, although I had now two characters as well as two appearances, one was wholly evil, and the other was still the old Henry Jekyll, that incongruous compound of whose reformation and improvement I had already learned to despair.

Dr. Jekyll recognizes Hyde as an evil being. For the most part, Jekyll hates Hyde.

I, who sicken and freeze at the mere thought of him, when I recall the abjection and passion of this attachment, and when I know how he fears my power to cut him off by suicide, I find it in my heart to pity him.

This quote is interesting because Jekyll admits that he pities Hyde. It also shows that Hyde recognizes the power Jekyll has by being able to commit suicide, therefore killing Hyde as well.

Henry Jekyll stood at times aghast before the acts of Edward Hyde, but the situation was apart from ordinary laws, and insidiously relaxed the grasp of conscience. It was Hyde, after all, and Hyde alone, that was guilty. Jekyll was no worse; he woke again to his good qualities seemingly unimpaired; he would even make haste, where it was possible, to undo the evil done by Hyde. And thus his conscience slumbered.

Jekyll separates himself from Hyde and puts the blame all on Hyde. He then tries to "undo the evil."

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The relationship between Jekyll and Hyde is essential to developing the theme of duality in this work. There are several reasons for this.

First, there is the core relationship. These men change into one another. They are one another's secret identity, in a way. When one man is present, the other doesn't exist.

Jekyll indicates other, deeper elements of their relationship in the work's final chapter. In that chapter Jekyll says that he's always had a divided self, and that through his research he has found that human nature is innately divided: we all have two selves, at least. (In that final chapter, Jekyll says there might be more selves.) So, the relationship between Jekyll and Hyde stands in for the duality in all mankind.

Another element is that the line between the two of them is not firm. It leaks. To be specific, Jekyll thinks he's been successful at dividing himself in two in a way that gives him complete control. He hasn't. At times he goes to sleep as Jekyll and wakes up as Hyde. This indicates that any duality is not absolute: what people repress or deny always comes back.

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