Two years ago a friend of mine gave me her copy of Irina Tweedie’s The Chasm of Fire: A Woman's Experience with the Teachings of a Sufi Master. The title is self-explanatory, and it’s a great read—it’s actually a portion of her larger work, Daughter of Fire, which I haven’t read. There are a couple lines in the first chapter that moved me; they were the first of many.
It is the task of the Teacher to set the heart aflame with an unquenchable fire of longing; it is his duty to keep it burning until it is reduced to ashes. For only a heart which has burned itself empty is capable of love.