In Wuthering Heights, Catherine and Heathcliffe show that they are the same person because of the obsessive manner in which they treat each other. From the beginning of their time together, Catherine and Heathcliffe each showed that they have a special need for one another and that they provide benefits for each other. Catherine was right, they did not have love they had an obsession with each other because they were the same soul. .
Catherine showed she liked being in control from early on and Heathcliff was able to give Catherine this sense of supremacy. In return, Catherine provided Heathcliffe with a valuable education and companionship. Because everyone from the Earnshaw mansion except Late Earnshaw, Catherine, and maybe Nelly, hated him, Heathcliffe knew that Catherine was the only person who would educate him. In addition, she provided Heathcliffe with a compassionate heart and gentle spirit. .
In the beginning, the feelings between Catherine and Heathcliffe had the potential to turn into love, but their separation turned their fragile emotions into an unquenched love and led to their obsession for one another. Catherine is the first to admit this obsession. '"My love for Heathcliffe resembles the eternal rocks beneath - a source of little visible delight, but necessary" (122). In a regular relationship, a woman may say that she loves her partner, but not that she needs him. Heathcliffe also showed a need for Catherine more than just love for her. Heathcliffe said that he was upset that she did not spend enough time with him. In a normal relationship, a man would not keep tabs on how much time his partner spends with him, he would have accepted her absence, but he shows his obsession with her by not being able to understand that she has other obligations. Even if a man may love his partner, he would not sacrifice his entire life to see them, unless he, like Heathcliffe, was so obsessed with them, that they felt they are part of one another.