In
mindfulness meditation, the subject sits comfortably, in silence, centering attention by focusing mental awareness an object or process (either the breathing process, a sound, a mantra koan or riddle evoking questions, a visualisation, or an exercise) and then consciously is encouraged to scan their thoughts in an open focus, shifting freely from one perception to the next (Kutz et al., 1985a, b). No thought, image or sensation is considered an intrusion.