Who said "One cannot fake passion or commitment on the stage."?

This quote is attributed to Maria Callas.

One cannot fake passion or commitment on the stage. - Maria Callas

"One cannot fake passion or commitment on the stage."

Maria Callas Truth

Opera Soprano Greek-American 1923–1977

"You have to fight to reach your dream. You have to sacrifice and work hard for it."

"If music is the food of love, play on."

"I am my own sanctuary and I can be reborn as many times as I choose throughout my life."

"The mission of an artist is to save the soul of mankind."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."