Who said "You must learn to control your emotions in business."?

This quote is attributed to Tom Hagen.

You must learn to control your emotions in business. - Tom Hagen

"You must learn to control your emotions in business."

Tom Hagen Work

"I'm a consigliere, not a driver."

"Never discuss business with a mouth full of food."

"A lawyer with his briefcase can steal more than a hundred men with guns."

"The Don has plans for you."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."