Yoga is a family of ancient spiritual practices that originated in India, where it remains a vibrant living tradition and is seen as a means to enlightenment. Karma Yoga, Bhakti Yoga, Jnana Yoga, and Raja Yoga are considered the four main yogas, but there are many other types. In other parts of the world where yoga is popular, notably the West, Yoga has become associated with the asanas (postures) of Hatha Yoga, which are popular as fitness exercises.
Yoga as a means to enlightenment is central to Hinduism, Buddhism, Sikhism, Jainism and has influenced other religious and spiritual practices throughout the world. Important Hindu texts establishing the basis for yoga include the Upanishads, Yoga Sutras of Patanjali, the Bhagavad Gita, and the Hatha Yoga Pradipika.
In Hinduism, Yoga is considered to be the ultimate way of attaining spiritual goals. The earliest written accounts of yoga appear in the Rig Veda, which began to be codified between 1500 and 1200 BCE. Some historians believe that this 5000-year-old sculpture is of a yogi.Modern yoga practice often includes traditional elements inherited from Hinduism, such as moral and ethical principles, postures designed to keep the body fit, spiritual philosophy, instruction by a guru, chanting of mantras (sacred syllables), quieting the breath, and stilling the mind through meditation. These elements are sometimes adapted to meet the needs of non-Hindu practitioners.
Proponents of yoga see daily practice as beneficial in itself, leading to improved health, emotional well-being, mental clarity, and joy in living. Yoga adepts progress toward the experience of samadhi, an advanced state of meditation where there is absorption in inner ecstasy.
The goals of yoga are expressed differently in different traditions. In theistic Hinduism, yoga may be seen as a set of practices intended to bring people closer to god - to help them achieve union with god. In Buddhism, which does not postulate a creator-type god, yoga may help people deepen their wisdom, compassion, and insight. In Western nations, where there is a strong emphasis on individualism, yoga practice may be an extension of the search for meaning in self, and integration of the different aspects of being. The terms Self-Realization and god-Realization are used interchangeably in Hindu yoga, with the underlying belief that the true nature of self, revealed through the practice of yoga, is of the same nature as god.
The ultimate goal of yoga is the attainment of liberation (Moksha) from worldly suffering and the cycle of birth and death (Samsara). Yoga entails mastery over the body, mind, and emotional self, and transcendence of desire. It is said to lead gradually to knowledge of the true nature of reality. The Yogi reaches an enlightened state where there is a cessation of thought and an experience of blissful union. This union may be of the individual soul (Atman) with the supreme Reality (Brahman), as in Vedanta philosophy; or with a specific god or goddess, as in theistic forms of Hinduism and some forms of Buddhism. Enlightenment may also be described as extinction of the limited ego, and direct and lasting perception of the non-dual nature of the universe.
For the average person still far from enlightenment, yoga can be a way of increasing one's spiritual awareness, or cultivating compassion and insight. While the history of yoga strongly connects it with Hinduism, proponents claim that yoga is not a religion itself, but contains practical steps which can benefit people of all religions, as well as those who do not consider themselves religious.
Images of a meditating yogi from the Indus Valley Civilization are thought to be 6 to 7 thousand years old. The earliest written accounts of yoga appear in the Rig Veda, which began to be codified between 1500 and 1200 BC. It is difficult to establish the date of yoga from this as the Rig Veda was orally transmitted for at least a millennium. The first Yoga text dates to around the 2nd century BC by Patanjali, and prescribes adherence to "eight limbs" (the sum of which constitute "Ashtanga Yoga") to quiet one's mind and merge with the infinite.
The first full description of the principles and goals of yoga are found in the Upanisads, thought to have been composed between the eighth and fourth centuries BC. The Upanisads are also called Vedanta since they constitute the end or conclusion of the Vedas (the traditional body of spiritual wisdom). In the Upanisads, the older practises of offering sacrifices and ceremonies to appease external gods gives way instead to a new understanding that man can, by means of an inner sacrifice, become one with the Supreme Being (referred to as Brāhman or Māhātman) -- through moral culture, restraint and training of the mind.
The word "yoga" derives from the Sanskrit root yuj ("to yoke"); which is cognate to modern English "yoke". Both derive from the Proto-Indo-European root *yeug- meaning "to join" or "unite".
It is generally translated as "union of the individual atma (loosely translated to mean soul) with Paramatma, the universal soul." This may be understood as union with the Divine by integration of body, mind, and spirit. Thus, in essence, one who attempts yoga may loosely be referred to as a yogi or in Sanskrit, a yogin (masculine) or yogini (feminine). These designations are actually intended for advanced practitioners , who have already made considerable progress along the path, towards yoga.
Over the long history of yoga, different schools have emerged, and there are numerous examples of subdivisions and synthesis. It is common to speak of each form of yoga as a "path" to enlightenment. Thus, yoga may include love and devotion (as in Bhakti Yoga), selfless work (as in Karma Yoga), knowledge and discernment (as in Jnana Yoga), or an eight-limbed system of disciplines emphasizing meditation (as in Raja Yoga). These practices occupy a continuum from the religious to the scientific[citation needed] . They need not be mutually exclusive. (A person who follows the path of selfless work might also cultivate some knowledge and devotion.) Some people (particularly in Western cultures) pursue Hatha yoga as exercise divorced from spiritual practice.
Other types of yoga include Mantra Yoga, Kundalini Yoga, Iyengar Yoga, Kriya Yoga, Integral Yoga, Nitya Yoga, Maha Yoga, Purna Yoga, Anahata Yoga, Tantra Yoga, Tibetan Yoga, etc. It is often helpful to check the teacher and lineage to be sure how these terms are being used. Another name for Raja Yoga ("royal yoga") is Ashtanga Yoga ("eight-limbed yoga"), but this should not be confused with the Ashtanga Vinyasa Yoga developed by Sri K. Pattabhi Jois, which is a specific style of Hatha Yoga practice.