Wuthering Heights: Friendship or Passion - The Chemistry Between Heathcliff and Cathy Friendship between two friends shows that they can trust and help one another. Passion, on the other hand, is a strong affection between two lovers. In Wuthering Heights, Emily Bronte is most interested in the spiritual feelings of her two main characters, Heathcliff and Catherine Earnshaw. The feeling that Catherine Earnshaw and Heathcliff has for each other is passion. The two began as friends and later realize they are the missing parts to one another. The feeling Cathy