As the brain is the instrument of the mind which is invisible, and the heart of flesh is the vehicle of the heart within which is above substance, so it is the illumination of the soul, our invisible being, whose light is reflected within this physical body. When active it beams through the eyes, through the radiance of the countenance, charging the whole environment with a magnetic atmosphere. This light being originated from sound, both light and sound echo in the dome of the temple of this physical body, though neither in reality belongs to it. To the Sufi, the seeker of the self within, they are vouchsafed when he has control over the gateways of this holy temple, the physical body. Then, instead of reflecting outward through the expression, the light and sound both manifest within.