I think that there is always something you can learn or some usefulness in the book, no matter what it is. Each book contains knowledge, a powerful tool if it can be harnessed. It is influential to the book because when people questioned why stories of Don Quixote should be read, they were greeted with this quote as an answer.
A theme of Don Quixote is: social class doesn’t guarantee knowledge and wisdom. It can also be said that money doesn’t buy knowledge. For example, the simple peasant worker, Sancho Panza, is diligent, witty, helpful, and loyal. The Duke and the Duchess have a high status, but are all about making Don Quixote and his squire miserable. They sponsor all sorts of tricks for their gratification. Another example are the low class hard workers that are wise and