Yoga Sutras of Patanjali - 8 Limbs Of Yoga

In Hindu philosophy, yoga is the name of one of the six orthodox (which accept the testimony of Vedas) philosophical schools. founded by Patanjali. Karel Werner, author of Yoga And Indian Philosophy, believes that the process of systematization of yoga which began in the middle and Yoga Upanishads culminated with the Yoga Sutras of Patanjali.Scholars also note the influence of Samkhyan and Buddhist ideas on the Yoga Sutras.The yoga school 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.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...."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").
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Patanjali is widely regarded as the compiler of the formal yoga philosophy.The verses of Yoga Sutras are terse and are therefore read together with the Vyasa Bhashya (c. 350–450 CE), a commentary on the Yoga Sutras.Patanjali's yoga is known as Raja yoga, which is a system for control of the mind. 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)".The use of the word nirodhaḥ in the opening definition of yoga is an example of the important role that Buddhist technical terminology and concepts play in the Yoga Sutras; this role suggests that Patanjali was aware of Buddhist ideas and wove them into his system. Swami Vivekananda translates the sutra as "Yoga is restraining the mind-stuff (Citta) from taking various forms (Vrittis).
Patanjali's writing also became the basis for a system referred to as "Ashtanga Yoga" ("Eight-Limbed Yoga"). This eight-limbed concept derived from the 29th Sutra of the 2nd book, and is a core characteristic of practically every Raja yoga variation taught today. The Eight Limbs are:

-Yama (The five "abstentions"): Ahimsa (non-violence), Satya (Truth, non-lying), Asteya (non-covetousness), Brahmacharya (non-sensuality, celibacy), and Aparigraha (non-possessiveness).
-Niyama (The five "observances"): Shaucha(purity), Santosha(contentment), Tapas (austerity), Svadhyaya (study of the Vedic scriptures to know about God and the soul), and Ishvara-Pranidhana (surrender to God).
-Asana: Literally means "seat", and in Patanjali's Sutras refers to the seated position used for meditation.
-Pranayama ("Suspending Breath"): Prāna, breath, "āyāma", to restrain or stop. Also interpreted as control of the life force.
-Pratyahara ("Abstraction"): Withdrawal of the sense organs from external objects.
-Dharana ("Concentration"): Fixing the attention on a single object.
-Dhyana ("Meditation"): Intense contemplation of the nature of the object of meditation.
-Samadhi ("Liberation"): merging consciousness with the object of meditation.

In the view of this school, the highest attainment does not reveal the experienced diversity of the world to be illusion. The everyday world is real. Furthermore, the highest attainment is the event of one of many individual selves discovering itself; there is no single universal self shared by all persons.