Who said "Success requires total devotion to one's art."?

This quote is attributed to Norma Desmond.

Success requires total devotion to one's art. - Norma Desmond

"Success requires total devotion to one's art."

Norma Desmond Work

"I am big. It's the pictures that got small."

"Without me, there wouldn't be any Paramount pictures."

"I don't go out much anymore. I just sit in my room and watch the old pictures."

"The dream was always stronger than the life."

"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."