The worst thing you can do is to upset someone in this busin... - Michael Corleone

"The worst thing you can do is to upset someone in this business."

Michael Corleone

More from Michael Corleone

"I'm gonna make him an offer he can't refuse."

"It's not personal, Sonny. It's strictly business."

"A man who doesn't spend time with his family can never be a real man."

"The things you own end up owning you."