In this passage from Wuthering Heights, the narrator reflects on his unrequited love for Catherine. He considers himself more deserving of her affection, believing that his capacity to love surpasses Edgar Linton's, emphasizing the depth and intensity of his feelings. He claims that Catherine's heart is as vast as the sea, yet he feels she can only give limited love to Edgar, comparable to her affection for her pets.
The narrator expresses frustration and a sense of injustice, asserting that Catherine's love for Edgar is superficial and not as genuine as her love for him. He doubts Edgar's ability to truly love Catherine in return, implying that their love is unequal and that Catherine's affections are misplaced. His words reveal his passionate, jealous nature and the pain of loving someone who does not love him back fully.