English resources/Dr Jekyll and Mr Hyde/Duality
Two sides in one person. Jekyll wanted to split the good from the bad. The bad one won.

15 quotes, in the order they happen.
The large handsome face of Dr. Jekyll grew pale to the very lips, and there came a blackness about his eyes.
Narrator · Chapter 3: Dr Jekyll Was Quite at Ease · secrecy · duality
When Utterson mentions Hyde, Jekyll goes white. His face gives him away.
the moment I choose, I can be rid of Mr. Hyde.
Jekyll · Chapter 3: Dr Jekyll Was Quite at Ease · duality · science
Jekyll thinks he is in control. He can stop whenever he wants. He cannot.
the two hands are in many points identical: only differently sloped
Guest · Chapter 5: Incident of the Letter · duality · secrecy
Hyde's handwriting is Jekyll's, leaning the other way. A clue nobody follows.
I am very low, Utterson," replied the doctor drearily, "very low. It will not last long, thank God.
Jekyll · Chapter 7: Incident at the Window · duality · secrecy
Jekyll at the window, sad and sick. He knows the end is coming.
an expression of such abject terror and despair, as froze the very blood of the two gentlemen below
Narrator · Chapter 7: Incident at the Window · duality · evil
Mid-sentence, Jekyll's face changes to horror. He slams the window. Hyde is coming out.
Sir, if that was my master, why had he a mask upon his face?
Poole · Chapter 8: The Last Night · secrecy · duality
Poole the servant has seen the thing in the lab. It wore a mask. It was not his master.
that thing was not my master, and there's the truth.
Poole · Chapter 8: The Last Night · duality
Poole cannot say what it was. Only what it was not.
O God!" I screamed, and "O God!" again and again
Lanyon · Chapter 9: Dr Lanyon's Narrative · science · religion · duality
Lanyon watches Hyde drink the potion and turn into Jekyll. He cannot stop screaming.
man is not truly one, but truly two
Jekyll · Chapter 10: Henry Jekyll's Full Statement of the Case · duality
The heart of the book. Every person has two selves.
I was slowly losing hold of my original and better self, and becoming slowly incorporated with my second and worse.
Jekyll · Chapter 10: Henry Jekyll's Full Statement of the Case · duality · evil
Hyde is winning. Jekyll can feel himself disappearing.
Edward Hyde, alone in the ranks of mankind, was pure evil.
Jekyll · Chapter 10: Henry Jekyll's Full Statement of the Case · evil · duality
Everyone else is a mix. Hyde is the only pure thing. Pure evil.
This, too, was myself.
Jekyll · Chapter 10: Henry Jekyll's Full Statement of the Case · duality
Jekyll sees Hyde in the mirror and admits it. That is me too.
Henry Jekyll stood at times aghast before the acts of Edward Hyde
Jekyll · Chapter 10: Henry Jekyll's Full Statement of the Case · duality · reputation
Jekyll is shocked by what Hyde does. But he made Hyde so he could do it.
I bring the life of that unhappy Henry Jekyll to an end.
Jekyll · Chapter 10: Henry Jekyll's Full Statement of the Case · duality · secrecy
The last line. He does not know if Hyde will die or hang. He is done writing.
the powers of Hyde seemed to have grown with the sickliness of Jekyll
Jekyll · Chapter 10: Henry Jekyll's Full Statement of the Case · duality · evil
The weaker Jekyll gets, the stronger Hyde grows.