Two ways Frankenstein has changed throughout the novel

We can see that throughout the novel Frankenstein had been changed cardinally. In the beginning of the story he is in love with Eliz. Eliz was his sister but they didn't feel as sister and brother to each other. Later when Frankenstein becomes ferine and obsessed with a creating a monster, Eliz feels morose and very lonely. She thought he start forgeting her. The further we read, the more we see the picture of a doctor. After creating his monster Frankenstein understood, that that was a bad idea. He realized he did a mistake. Monster felt that. Later, because he feel unwanted, monster kills his brother William, Justin (nurse), Henry (his friend), and Eliz (his fiancee). Doctor Frankenstein wants revenge for deaths of his family, which goes after the monster. He would do an arduous to be quits with his monster. As the result of some circumstances we can see how person can be changed easily from good side to bad one. After doctor Frankenstein has been through a lot of rough moments in his life, he couldn't convalescence.