To begin 10-20 minutes, later 30-60 minutes
The eight levels of Self-Inquiry Meditation are described at the end of the eight exercise levels. Level 1/4 is focused on Concentration on Inner Purification:
Visualise and feel how wastes and toxins flow out of the body with the exhalation.
Visualise and feel how all negative thoughts and feelings are removed with the exhalation.
Feel the inner purification of body and mind - how body and mind feel refreshed.