Who said "The greatest achievement is to touch a human heart."?

This quote is attributed to Maria Callas.

The greatest achievement is to touch a human heart. - Maria Callas

"The greatest achievement is to touch a human heart."

Maria Callas

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."