The book The Godfather was written by Mario Puzo and published in 1969. The story, which was later made into a trilogy of movies, focuses largely on the business and personal lives of an Italian mafia family living in New York. Some of the most famous quotes about the blending of business and personal include:

“Tom, don’t let anybody kid you. It’s all personal, every bit of business. Every piece of shit every man has to eat every day of his life is personal. They call it business. Ok. But it’s personal as hell.

You know where I learned that from? The Don. My old man. The Godfather. If a bolt of lightning hit a friend of his, the old man would take it personal. He took my going into the Marines personal. That’s what makes him great. The Great Don. He takes everything personal like God.

He knows every feather that falls from the tail of a sparrow or however the hell it goes. Right? And you know something? Accidents don’t happen to people who take accidents as a personal insult.

He had long ago learned that society imposes insults that must be borne, comforted by the knowledge that in this world there comes a time when the most humble of men, if he keeps his eyes open, can take his revenge on the most powerful.

It was this knowledge that prevented the Don from losing the humility all his friends admired in him. When they come … they come at what you love. They made it personal when they shot Pop. It is not business, it’s personal.”