A sacred spiritual science, originating millenniums ago in India. It includes certain techniques of meditation whose devoted practice leads to realization of God. Paramahansa Yogananda has explained that the Sanskrit root of kriya is kri, to do, to act and react; the same root is found in the word karma, the natural principle of cause and effect. Kriya Yoga is thus "union (yoga) with the Infinite through a certain action or rite (kriya)." Kriya Yoga is praised by Krishna in the Bhagavad Gita and by Patanjali in the Yoga Sutras. Revived in this age by Mahavatar Babaji (q.v.), Kriya Yoga is the diksha (spiritual initiation) bestowed by the Gurus of Self-Realization Fellowship. Since the mahasamadhi (q.v.) of Paramahansa Yogananda, diksha is conferred through his appointed spiritual representative, the president of Self-Realization Fellowship/ Yogoda Satsanga Society of India (or through one appointed by the president). To qualify for diksha Self-Realization members must fulfill certain preliminary spiritual requirements. One who has received this diksha is a Kriya Yogi or Kriyaban.
Further Reading: Kriya Yoga