"Monks, you should dwell with the doors to your senses well-guarded. ...On hearing a sound with the ear, do not grasp at any theme or details by which — if you were to dwell without restraint over the faculty of the ear — evil, unskillful qualities such as greed or distress might assail you. Practice for its restraint. Guard the faculty of the ear. Secure your restraint with regard to the faculty of the ear."