" Definition of a Sufi
To learn, people must give up a great deal, and this includes ritual as something from which they imagine they might learn. It is to emphasise this that Abu-Yaqub al-Susi, quoted in Kalabadhi's Taaruf, states that the Sufi is 'One who does not care when something is taken from him, but who does not cease to seek for what he has not. "

― Idries Shah , Learning How to Learn: Psychology and Spirituality in the Sufi Way