When Victor Frankenstein and the monster finally meet, the creature tells a story of his moral transformation. Driven by the need to feel accepted but unable to fulfill it, he turns to the path of violence and revenge.
Detailed answer:
When Victor Frankenstein meets the monster on the Glacier of Montanvert in the Alps, he tells the scientist the story of his life and moral struggles. The creature recalls the first hours after his birth when feelings and bodily sensations he did not understand overflew him. The monster starts to wander, fleeing from the city and villages where he is not welcomed. He learns to live in the forest, feeding himself from mushrooms and berries.
He finds a small shed and lives there for some time. The beast observes and studies the life of the family that lives in the neighboring cottage and grows attached to them. The monster studies books that he finds in the shed. He learns to talk and read and discovers his creation story. Overflown with feelings of love and sympathy toward the family, but aware of his hideous appearance, the monster decides to reveal his presence to them. When seeing the creature, they are frightened of him. In despair, the monster swears revenge on his creator for bringing him into a world that does not accept him.
The monster’s story reveals the nature of his personality and the evolution of his moral views. Born and educated to appreciate beauty and love, he finds himself feared and unaccepted by society. Like any being, the monster needs kindness and sympathy. But he discovers that he is deemed unworthy of love and fair treatment. Lonely and isolated, the beast finds out how he was created and turns to the path of violence to revenge his maker. He is perceived by society as a monster and starts to act like one.