- Catherine's attitudes towards love and marriage
- Heathcliff's disappearance
- Foreshadowing of Catherine's death
- "'Here! and here!' replied Catherine, striking one hand on her forehead, and the other on her breast"
- "like wine through water, and altered the colour of my mind"
- "'We're dismal enough without conjuring up ghosts, and visions to perplex us"
- "'If I were in heaven, Nelly, I should be extremely miserable'"
- "I've no more business to marry Edgar Linton than I have to be…