Who said "But that's the life we're living."?

This quote is attributed to Sonny Corleone.

But that's the life we're living. - Sonny Corleone

"But that's the life we're living."

Sonny Corleone

"Go to the mattresses. That's what we do when there's a war."

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

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

"It's not personal, it's just business."