The ney opens the Mathnawi, Jalal al-Din Rumi's great Sufi poem, with the instrument speaking in its own voice: listen to this reed, how it complains, telling a story of separations. The reed, in Rumi's image, was once part of a reed bed, whole and unremarkable, until it was cut and hollowed and made to cry. Sufi listeners have long taken the reed's cry as an image of the human soul, which Sufi cosmology holds was once united with the divine before being separated into an individual, embodied life, and which longs, through that ache, to return.
The physical instrument bears out the metaphor: a simple length of cane, open at both ends, producing a breathy, unstable tone that changes with the smallest movement of the player's breath and angle against the mouthpiece. Learning to control that instability, rather than eliminate it, is considered part of the ney player's discipline, since the trembling of the tone is read as expressive rather than a flaw to be corrected. The ney requires years of study to play with any control at all, and Sufi teaching has traditionally treated that difficulty as fitting: an instrument that demands patient, humbling practice to produce its full breathing cry is an apt companion to a tradition built around the same qualities in its human students.