Franco Zeffirelli on Callas

"The magic of a Callas is a quality few artists have ... There are many very good artists, but very few who have that sixth sense, the additional, the plus quality. It is something which lifts them from the ground: they become like semi-gods. She had it.” – Franco Zeffirelli, as quoted in Callas: The Art and the Life (1974) by John Ardoin