There are two kinds of loud voices: the vocally loud, which is the vulgar voice; and the dynamically loud, which is the powerful voice. A voice, however powerful it may be, should be inferior to the power which animates it.
Every object of agreeable or disagreeable aspect which surprises us, makes the body recoil. The degree of reaction should be proportionate to the degree of emotion caused by the sight of the object.
Without abnegation, no truth for the artist. We should not preoccupy the audience with our own personality. There is no true, simple or expressive singing without self-denial. We must often leave people in ignorance of our own good qualities.
To use expression at random on our own authority, expression at all hazards, is absurd.
The mouth is a vital thermometer, the nose a moral thermometer.