Estella marries Drummle in "Great Expectations" due to her belief that social status is the most important thing in life and to secure her own self-preservation after the emotional trauma she experienced in her relationship with Pip.
Catherine and Heathcliff develop such a strong bond due to their shared experiences of neglect, abuse, and isolation, and their mutual understanding and love for one another.
Dante wrote the Inferno to express his political and theological beliefs as well as to provide a literary representation of the Christian concept of Hell.