Thus the teaching and the occupation of the Sufi is to erase that error from the surface of his heart, and therefore the first and last lesson that the Sufi learns is: I am not, Thou art. And when the false claim no longer exists in his consciousness, then the claim can be made which is expressed in the Bible that first was the Word, and the Word was God. And by listening to that divine Word, by giving himself to that Word, the Sufi experiences the heavenly joy which is incomparable, the joy which is ecstasy.