Who said "You have to practice a lot to become a professional."?

This quote is attributed to Miles Davis.

You have to practice a lot to become a professional. - Miles Davis

"You have to practice a lot to become a professional."

Miles Davis Work

Jazz Trumpeter Composer American 1926–1991

"Do not fear mistakes. There are none."

"Man, sometimes it snows in April."

"If you understood everything I said, you'd be me."

"Don't play what's there, play what's not there."

"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."