By understanding Rousseau’s Treatise on Education, where he emphasizes his pupil should learn only what truly interested him. No one, including his father, can force him to learn the topic he hates because he will learn nothing from it. Through Rousseau’s theory, we can better understand why the monster in Frankenstein can be able to adapt to the human culture. The monster learns to speak, read and write all by himself, with full passion to learn everything about human being. The monster is so successful in attaining his education because he is truly interested in his subject and his voluntary action to learn allows him to develop internal maturity that makes him become closer to a man.