No doubt it is difficult to give a certain rule of reading this language expressed in the face, form, or movements. But two things can help one to understand it: Keen observation to study human nature, and developed intuition. Then one begins to have a sort of key to this language; but if you ask him, he cannot express it. From different compositions of composers one can imagine their character, their life and state of mind. As in the science of sound there is a tone and an overtone, so in the music of a certain composer there is a sense which stands together with the music. The one who hears the notes, he only enjoys the music; the one who understands the sense, he knows the mind of the composer.