In Indian philosophy, Yoga is the name of one of the six orthodox philosophical schools.[32][33] The Yoga philosophical system is closely allied with the Samkhya school.[34] The Yoga school as expounded by Patanjali accepts the Samkhya psychology and metaphysics, but is more theistic than the Samkhya, as evidenced by the addition of a divine entity to the Samkhya's twenty-five elements of reality.[35][36] The parallels between Yoga and Samkhya were so close that Max Müller says that "the two philosophies were in popular parlance distinguished from each other as Samkhya with and Samkhya without a Lord...."[37] The intimate relationship between Samkhya and Yoga is explained by Heinrich Zimmer:
These two are regarded in India as twins, the two aspects of a single discipline. Sāṅkhya provides a basic theoretical exposition of human nature, enumerating and defining its elements, analyzing their manner of co-operation in a state of bondage (bandha), and describing their state of disentanglement or separation in release (mokṣa), while Yoga treats specifically of the dynamics of the process for the disentanglement, and outlines practical techniques for the gaining of release, or 'isolation-integration' (kaivalya).[38]
The sage Patanjali is regarded as the founder of the formal Yoga philosophy.[39] The Yoga Sutras of Patanjali are ascribed to Patanjali, who, may have been, as Max Müller explains, "the author or representative of the Yoga-philosophy without being necessarily the author of the Sutras."[40] Indologist Axel Michaels is dismissive of claims that the work was written by Patanjali, characterizing it instead as a collection of fragments and traditions of texts stemming from the second or third century.[41] Gavin Flood cites a wider period of uncertainty for the composition, between 100 BCE and 500 CE.[42]
Patanjali's yoga is known as Raja yoga, which is a system for control of the mind.[43] Patanjali defines the word "yoga" in his second sutra, which is the definitional sutra for his entire work:
yogaś citta-vṛtti-nirodhaḥ- Yoga Sutras 1.2
This terse definition hinges on the meaning of three Sanskrit terms. I. K. Taimni translates it as "Yoga is the inhibition (nirodhaḥ) of the modifications (vṛtti) of the mind (citta)".[44] Swami Vivekananda translates the sutra as "Yoga is restraining the mind-stuff (Citta) from taking various forms (Vrittis)."[45] Gavin Flood translates the sutra as "yoga is the cessation of mental fluctuations".[46]
A sculpture of a Hindu yogi in the Birla Mandir, Delhi
Patanjali's writing also became the basis for a system referred to it as "Ashtanga Yoga" ("Eight-Limbed Yoga"). This eight-limbed concept derived from the 29th Sutra of the 2nd book became a feature of Raja yoga, and is a core characteristic of practically every Raja yoga variation taught today.[1]The Eight Limbs of yoga practice are:
(1) Yama (The five "abstentions"): nonviolence, truth, non-covetousness, chastity, and abstain from attachment to possessions.
(2) Niyama (The five "observances"): purity, contentment, austerities, study, and surrender to god
(3) Asana: Literally means "seat", and in Patanjali's Sutras refers to seated positions used for meditation. Later, with the rise of Hatha yoga, asana came to refer to all the "postures"
(4) Pranayama ("Lengthening Prāna"): Prāna, life force, or vital energy, particularly, the breath, "āyāma", to lengthen or extend
(5) Pratyahara ("Abstraction"): Withdrawal of the sense organs from external objects.
(6) Dharana ("Concentration"): Fixing the attention on a single object
(7) Dhyana ("Meditation"): Intense contemplation of the nature of the object of meditation
(8) Samadhi ("Liberation"): merging consciousness with the object of meditation
It details every aspect of the meditative process, and the preparation for it. The book is available in as many as 40 English translations, both in-print and on-line.[2][3][4][5][6][7][8] [9]


