9. Munnacittukammayata-nana (Knowledge of the Desire for Deliverance)
Realizing danger and peril from the seventh yana, and disgust from the eighth, the yogi becomes filled with a desire for deliverance from rupa and nama. It is like someone who is in a jail and wishes every moment to escape
The sixth, seventh and eighth yana are related, with each one becoming stronger. Knowledge of fearfulness leads to knowledge of danger, knowledge of danger leads to knowledge of disgust, which leads to knowledge of desire for deliverance. This yana (ninth) then leads to nibbana. Desire for deliverance results in more earnestness in practice, in order to reach nibbana.