"I write for no other purpose than to add to the beauty that now belongs to me. I write a book for no other reason than to add three or four hundred acres to my magnificent estate"

This quote by Jack London suggests that he is motivated by a desire for wealth and power. He is composing a book in order to increase his estate, which is already quite big. He is not composing for any other function than to contribute to his own charm and wealth. This suggests that he is driven by a desire for product gain and is not thinking about composing for any other factor. He is not writing for the sake of art or to share his ideas with the world, but rather to increase his own wealth and power. This quote shows the idea that cash and power are the ultimate goals for many individuals, and that they are willing to do whatever it requires to achieve them.