The greatest punishment we could invent for her was to keep her separate from him…

My love for Heathcliff resembles the eternal rocks beneath: a source of little visible delight, but necessary. Nelly, I am Heathcliff! He’s always, always in my mind: not as a pleasure, any more than I am always a pleasure to myself, but as my own being.

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 the earth. Be with me always--take any form--drive me mad. Only do not leave me 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!

I got the sexton, who was digging Linton’s grave, to remove the earth off her coffin lid, and I opened it. I thought, once, I would have stayed there, when I saw her face again—it is hers yet—he had hard work to stir me; but he said it would change, if the air blew on it...

He shall never know how I love him

Nelly, I am Heathcliff - he's always, always in my mind - not as a pleasure, any more then I am always a pleasure to myself - but, as my own being.