Recently I read a book by a professional dancer that recommended dancing as a means to achieve spiritual enlightenment.  While I can't totally agree with that view, she does have a point.  Dancing, singing, even playing a musical instrument can aid in spiritual development.  The chanting of mantras isn't just to calm the mind, but also to establish rhythmic vibrations.  Just as Cymatherapy uses sound vibrations to help diseased organs change their vibration rate to that of healthy organs, which can help those organs become healthy again, the rhythm and vibrations of music, dancing, chanting, perhaps even rocking in a rocking chair, can help us bring our vibration rate closer to that of the angels and Beings of Light who can then communicate with us.