TB : In the novel I hope Vito acknowledged the Cereventes when he made his "cold revenge" statement. It was Cerveventes who said "revenge is a dish best served cold".
I didn't know that. Interesting.
I haven't read
Don Quixote but it is apparently the source for many common expressions, including "the sky's the limit," "there's no love lost between them," and "give the devil his due."
Amazing that something not even written in English could have such an impact on the language hundreds of years later.