"I feel the meaning of the music, the tragedy or comedy, the sadness or
gayety of it each time I perform it, but not, as a rule, to the extent
of being entirely worn out with emotion. It depends, however, on the
occasion. If you are singing in a foreign language, which the audience
does not understand, you make every effort to 'put it over,' to make
them see what you are trying to tell them. You strive to make the song
intelligible in some way. You may add facial expression and gesture,
more than you would otherwise do. All this is more wearing because of
the effort involved.