Who said "I've learned that fear is the best motivator."?

This quote is attributed to Mike Ehrmantraut.

I've learned that fear is the best motivator. - Mike Ehrmantraut

"I've learned that fear is the best motivator."

Mike Ehrmantraut

"A man provides. And he does it even when he's not appreciated or respected or even loved. He simply bears up and he does it. Because he's a man."

"No more half measures."

"I am the man who gets things done."

"You know what business is, boy? It's all about relationships."