Frankenstein 13

I wonder what relief Frankenstein felt when he read Paradise lost. He begins to ask questions such as "Who am I? Why am I here?" Which again reminds me of the whole religious tie I mentioned earlier. I wonder if this book has to do with human nature and our purpose? But I don't know why Mary chose to make him a monster and how that ties with humans. Unlike Adam and Eve, the monster hated his creator. Maybe it has to do with why God created people with sin?