“Absolute (or complete) retention.” It is the retention of breath without inhalation or exhalation, which leads to stillness of the mind. Kevala kumbhaka is an advanced form of pranayama (control and awareness of the energies associated with breathing). It is obtained after a perseverant practice of pranayama and should occur without strain. The Hatha Yoga Pradipika (2:73-74) affirms that for the yogi who is able to obtain kevala kumbhaka “…nothing in the three worlds is difficult for him to obtain.” Kevala kumbhaka is also a condition that may appear during deep meditation.