Yogic powers called Siddhis are acquired by constant practice of certain yogic disciplines. All sources agree that the ascetic Gautama practised under two teachers of yogic meditation. The "Yoga Sutras of Patanjali" are an early codification of Yogic practices. Nagaraj performed intensive yogic sadhana for a long time with him. Such a goal could be ascetic, spiritual, yogic or any other. Later developments in the various Buddhist traditions led to new innovations in yogic practices. Through their continual yogic practices the Sadhus articulate the transitory aspect of life. In Hinduism, the hand gesture is known as the "Apana yogic mudra". Yogic systems stress the importance of stabilizing this chakra. Another humorous scene is the carvings of monkeys copying the yogic scenes of the sages. Throughout his life, Harbhajan Singh continued his practice and pursuit of yogic knowledge. It teaches seven stages or "bhumis" of yogic practice. "Pancha Bhoota Stalam" is representation of "pancha bhoota" for yogic practice. Biological alterations by Yogic techniques may be used to warn people against such reactions. "Atiyoga" here is not a vehicle, but a stage or aspect of yogic practice.