Themes — Duality & Repression

Duality and repression are the core themes of The Strange Case of Dr Jekyll and Mr Hyde. Understanding how Stevenson explores them — and connecting them to Victorian context — is essential for a top-grade response.

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Duality

What is duality?

Duality means the existence of two opposing parts within a single entity. In Jekyll and Hyde, duality operates on multiple levels:

Level	Example
Individual	Jekyll contains both good and evil
Physical	Jekyll's house has a respectable front and a sinister back
Urban	London has grand squares and dark alleyways
Social	Victorian society demands respectability but harbours vice
Scientific/moral	Science can enlighten or destroy

Jekyll's understanding of duality

Jekyll's central discovery is expressed in one of the novella's most important quotes:

"I learned to recognise the thorough and primitive duality of man." (10)

He comes to believe that every person is not one but two — containing both a moral, civilised self and a primitive, evil self.

"man is not truly one, but truly two" (10)