Here are some quotes by Khan from his book "The Mysticism of Sound & Music".
Thanks to my buddy Brian Berge who compiled these.
It is owing to our limitation that we cannot see the whole Being of God.
Among all the different arts, the art of music has been especially considered divine, because it is the exact miniature of the law working through the whole universe.
Music is the language of beauty, the language of the one whom every living soul has loved.
Music excells religion.... For those who follow the path of the inner cult, music is most essential for their spiritual development.
Music alone can be the means by which the souls...may one day be united. Music is...rhythm and tone which reach far beyond language. The more the musician is concious of his mission in life, the greater service he can render to humanity.
When meeting those who have touched some perfection in music...one can feel the harmony which is the real test of perfection not only in their music, but in their lives. If this principle of music were followed, there would be no need for an external religion. Some day music will be the means of expressing universal religion. ...There will come a day when music and its philosophy will become the religion of humanity.
Freedom is the nature of the soul, and for the soul the whole tragedy of life is the absence of that freedom which belongs to its original nature....The only reason why the soul has entered the body...or matter is to experience the music of life, and to make this music clear to itself.
...The unlimited part of ourselves becomes limited and earthbound for the purpose of making this life, which is the outward life, more intelligible.
The one who finds the key to the music of the whole working of life--it is he who becomes intuitive; it is he who has inspiration; it is he to whom revelations manifest, for then his language becomes music.... There is no other language: it is rhythm, it is tone.
First he must hear what his own heart says; then he hears what is in the hearts of others--in their presence and in their absence.
The staircase is made for us to ascend, not for us to continue stepping in one place.