Spiritual hunger is a living, radiant fire put by God into the hearts of His servants so that their ego can be burned; when it has been burned, this fire then becomes the fire of longing, which never dies, either in this world or the next.
There is no quicker way to God than spiritual hunger; if it travels through solid rock, water gushes forth.
— Abu Sa'id Ibn Abi Khayr , Perfume of the Desert by Andrew Harvey, Eryk Hanut