The process of performing Kriya Yoga is claimed to lead to a certain purification of the blood which frees up the life force to withdraw into the spine. ""Kriya Yoga" is a simple, psycho-physiological method by which the human blood is decarbonized and recharged with oxygen. The atoms of this extra oxygen are transmuted into life current to rejuvenate the brain and spinal centers. By stopping the accumulation of venous blood, the yogi is able to lessen or prevent the decay of tissues; the advanced yogi transmutes his cells into pure energy. Elijah, Jesus, Kabir and other prophets were past masters in the use of "Kriya" or a similar technique, by which they caused their bodies to materialize and dematerialize at will."