In Sanskrit breath is called prana, the very life. And what is voice? Voice is breath. If there is anything in life, in man's constitution, which may be called life, it is the breath. Breath manifested outwardly - the sound of the voice - is called prana. Therefore a person can best express himself in song, or in what he says. If there is anything in the world that can give expression to the mind and the feelings it is the voice. Often it happens that a person talks on a subject with a thousand words, and it has no influence. Another person expresses a thought in three words, and makes a deep impression. This shows that the power is not in the words, but in what is behind the words; that is: in the psychological power in the voice which comes from prana. According to the strength it has, it impresses the listener.