"There are five different aspects of the art of music; popular, that which induces motion of the body; technical, that which satisfies the intellect; artistic, that which has beauty and grace; appealing , that which pierces the heart; uplifting, that in which the soul hears the music of the spheres."
Hazrat Inayat Khan 


"...health is a condition of perfect rhythm and tone.  And what is music?  Music is perfect rhythm and tone.  When the health is out of order it means the music is out of order.  Therefore when the music is not right in us the help of harmony and rhythm is very necessary to bring us into a state of harmony and rhythm.  This way of healing can be studied and understood by studying the music of one's own life, by studying the rhythm of the pulse, the rhythm of the beating of the heart and of the head.  Physicians who are sensitive to rhythm determine the condition of the patient by examining the rhythm of the pulse,the beating of the heart, the rhythm of the circulation of the blood.  And to find the real complaint a physician, with all his material knowledge, must depend upon his intuition and upon the use of his musical qualities."
...from Hazrat Inayat Khan pg 141

"For there is nothing in this world which can help one spiritually more than  music.  Meditation prepares , but music is the highest for touching perfection.  I have seen wonders happen through the psychological power of music, but only when there were congenial surroundings.  Five or six people, a moonlight night, or dawn, or sunset.  It seems that nature helps to complete the music, and both work together, for they are one. (pg 139)

"Sound becomes visible in the form of radiance.  This shows that the same energy which goes into the form of sound before being visible is absorbed by the physical body.  In that way the physical body recuperates and becomes charged with new magnetism."
...from  Hazrat Inayat Khan pp112