From an article on Teresa Berganza‘s website, “Teresa Berganza, canto as expression of a style”:

She’s got black eyes and a white simile . . . .

Her voice, the subduing voice of Teresa Berganza is something like the invocation of a mystery made accomplice to the shinning of her gaze; a voice full of magic, that isn’t an intention of itself but natural meaning to the service of a sentiment. She insufflates on a song both the ideal lyric purity of a melody and the taking of an existentialist dramatic passion; a voice to and for every vowel; a voice for musical words, which she melts in a prodigious way.

Teresa Berganza enriches the sounds through inexorable phraseology; managing to send forth nitid words through a melody, her “legato” fuses rhythms and cadencies like a goldsmith.

In Teresa Berganza everything previously said gives an abundant argumentation to deduct an aesthetic synthesis, over which a sound personality lays a style . . . .

Undoubtedly Mozart, Händel, Purcell, Offenbach, Bizet and Massenet in the
immense space of their glory, would tremble in pleasure if they heard this
outstanding Madrid citizen unravel the mystery they left for us in their
arias.