In Chapter 10 of Wuthering Heights, the focus shifts to Heathcliff's calculated manipulations as he seeks revenge against Edgar Linton. Following Catherine's marriage to Edgar, Heathcliff's bitterness intensifies, and he becomes fixated on destroying the happiness of those around him, particularly Edgar and his family.

The chapter begins with Nelly Dean recounting the events after Heathcliff's return to Wuthering Heights. He has now acquired wealth and power, which he intends to use to exert control over those he feels have wronged him. Heathcliff's first target is Isabella Linton, Edgar's younger sister. Heathcliff's interest in Isabella is not born out of genuine affection but rather as a means to further his vendetta against Edgar. He approaches her with an allure of charm and intensity that she finds irresistible, cleverly playing on her romantic notions.

Heathcliff's manipulation is evident in how he presents himself to Isabella, acting as though he is deeply enamored with her. This façade is a stark contrast to his true intentions, which are purely vindictive. Nelly observes how Isabella, blinded by love, fails to see Heathcliff's darker side, as he leads her to believe that they share a bond that transcends the animosity between their families. Heathcliff's tactics are marked by a ruthless cunning; he exploits Isabella's feelings and naivety for his personal gain.

As Isabella becomes more infatuated with Heathcliff, he makes the decision to marry her. This act is a calculated move designed to inflict pain on Edgar, knowing that the marriage will cause turmoil and distress. The wedding is portrayed as a means for Heathcliff to gain a foothold in the Linton family, thereby solidifying his plan for revenge. The narrative illustrates how Heathcliff's dark motivations warp his relationships, turning love into a weapon rather than a bond.

Nelly's recounting also highlights the stark contrast between Isabella's innocence and Heathcliff's malevolence. Isabella, who initially dreams of a romantic future, becomes increasingly ensnared in Heathcliff's web of manipulation. The chapter showcases the destructive power of unchecked passion and revenge, setting the stage for the tragic consequences that will arise from Heathcliff's calculated actions.

Ultimately, Chapter 10 serves as a pivotal moment where Heathcliff's character is illuminated through his interactions with Isabella. It underscores the themes of manipulation, revenge, and the complexities of love that permeate the novel, foreshadowing the turmoil that is yet to unfold as Heathcliff's plans come to fruition. Heathcliff's ruthless pursuit of vengeance against Edgar, via Isabella, reveals the depths of his despair and the lengths he will go to reclaim what he believes is rightfully his.