Who said "Acting is not a profession for the lazy or the cowardly."?

This quote is attributed to Spencer Tracy.

Acting is not a profession for the lazy or the cowardly. - Spencer Tracy

"Acting is not a profession for the lazy or the cowardly."

Spencer Tracy Courage

Actor American 1900–1967

"The best way to find yourself is to lose yourself in the service of others."

"There is a nobility in compassion, a beauty in empathy."

"Success is not final, failure is not fatal."

"The only way to do great work is to love what you do."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."