Chapter XX -XXX

If I were entirely contained here? My great miseries in this world have been Heatheliff's miseries, and I watched and felt each from the beginning: my great thought in living is himself. If all esle perished, and he remained, I should still continue to be; and if all else remaied, and he were annihilated, the universe would turn to a mighty stranger; I should not seem a part of it.  (Catherine ) 
--My love for Linton is like the foliage in the woods; time will change it. I'm well aware, as winter changes the trees. My love for Heathcliff resembles the eternal rocks beneath a source of little visible delight, but necessary.  Nell, I am Heathcliff! He's always always in my mind; not as a pleasure, any ore than I am always a pleasure to myself, but as my own being. (Catherine) 
"I wish I could hold you." she continued, bitterly, "till we were both dead! I shouldn't care what you suffered. i care nothing for your sufferings. Why shouldn't you suffere? I do! Will you forget me ? Will you be happy when I am in the earth? Will you say twenty years hence, "That's the grave of Catherine Earnshaw? I loved her long ago, and was wretched to lose her; but it is past. I've loved many others since; my children are dearer to me than she was; and, at death, i shall not rejoice that I are going to her; I shall be sorry that I must leave them!" Will you say so, Heathcliff?" (Catherine, Chapter XXV) 
"Are you possessed with a devil," he pursued, savagely, "to talk in that manner to me when you are dying? Do you reflect that all those words will be branded in my memory, and eating deeper eternally after you have left me? You know you lie to say I have killed you; and Catherine, you know that I could as soon forget you as my existence! Is it not sufficient for your infernal selfishness, that while you are at peace I shall writhe in the torments of hell?" (Heathcliff, Chapter XXV) 
"You teach me now how cruel you've been-- cruel and false. Why did you despise me? Why did you betray your own heart, Cathy? I have not one world of comfort. You deserve this. You have killed yourself. Yes, you may kiss me, and cry; and wring out my kisses and tears; they'll blight you --- they'll damn you. You loved me -- then what right had you to leave me? What right -- answer me -- for the poor fancy you felt for Linton? Because misery and degradation, and death, and nothing that God or Satan could inflict would have parted us, you , of your own will, did it. i have not broken your heart -- you have broken it; and in breaking it, you have broken mine. So much the worse for me that i am strong. Do i want to live? What kind of living will it be when you -- oh, God! would you like to live with your soul in grave?" (Heathcliff, Chapter XXV) 
"May she wake in torment!" he cried with frightful vehemence, stamping his foot, and groaning in a sudden paroxysm of ungovernable passion. "Why, she's a liar to the end! where is she? Not there --- not in heaven--- not perished---where? Oh! you said you cared nothing for my sufferings! And I pray one prayer --- i repeat it till my tongue stiffens --- Catherine Earnshaw, may you not rest as long as I am living; you said i KILLED YOU-- HAUNT ME, THEN! The murdered do haunt their murderers, I believe. I know that ghosts have wandered on earth. Be with me always -- take any form --- drive me mad! Only do NOT leave in this abyss, where I cannot find you! Oh, God! It is unutterable! I cannot live without my life! I cannot live without my soul!!" (Heathcliff, Chapter XXVI) 
"Disturbe her? No! She has disturbed me, night and day, through eighteen years --- incessantly --- remorselessly--- till yesternight; and yesternight I was tranguil. I dreamt i was sleeping the last sleep by that sleeper, with my heart stopped and my cheek frozen against hers." (Heathcliff, Chapter IX`)