"...My great miseries in this world have been Heathcliff's miseries, and I watched and felt each from the beginning; my great thought in living is himself. If all else perished, and he remained, I should still continue to be; and, if all else remained, and he were annihilated, the Universe would turn to a mighty stranger. I should not seem a part of it. 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. 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—so, don't talk of our separation again—it is impracticable...."
Catherine Earnshaw Linton to Nelly Dean