Who said "The only loyalty that matters is self-loyalty."?

This quote is attributed to Breaking Bad Walter White.

The only loyalty that matters is self-loyalty. - Breaking Bad Walter White

"The only loyalty that matters is self-loyalty."

Breaking Bad Walter White

"I am not in danger. I am the danger."

"What's the point of being alive if you don't at least try to do something remarkable?"

"I did it for me. I liked it. I was good at it."

"You know what happened? We stopped being human beings."