Guru ( ; IAST: guru) is a Sanskrit term for a "mentor, guide, expert, or master" of certain knowledge or field. In pan-Indian traditions, a guru is more than a teacher: traditionally, the guru is a reverential figure to the disciple (or shisya in Sanskrit, literally seeker [of knowledge or truth]) or student, with the guru serving as a "counsellor, who helps mould values, shares experiential knowledge as much as literal knowledge, an exemplar in life, an inspirational source and who helps in the spiritual evolution of a student". Many spiritual texts are written in a language which is not commonly understood by masses, or sometimes the scriptures present contradictory concepts. Hence, only a qualified teacher or the guru is required to interpret scriptures in the right context and avoid misunderstandings. A guru is also one's spiritual guide, who helps one to discover the same potentialities that the guru has already realized.

The oldest references to the concept of guru are found in the earliest Vedic texts of Hinduism. The guru, and gurukula – a school run by guru, were an established tradition in India by the 1st millennium BCE, and these helped compose and transmit the various Vedas, the Upanishads, texts of various schools of Hindu philosophy, and post-Vedic Shastras ranging from spiritual knowledge to various arts so also specific science and technology. In the tradition of Yoga that was widely followed throughout ancient India, Shiva was worshipped as the first Guru of mankind who imparted the knowledge of yoga to his disciples. By about mid 1st millennium CE, archaeological and epigraphical evidence suggest numerous larger institutions of gurus existed in India, some near Hindu temples, where guru-shishya tradition helped preserve, create and transmit various fields of knowledge. These gurus led broad ranges of studies including Hindu scriptures, Buddhist texts, grammar, philosophy, martial arts, music and painting.

The tradition of the guru is also found in Jainism, referring to a spiritual preceptor, a role typically served by a Jain ascetic.Jeffery D Long (2009), Jainism: An Introduction, IB Tauris, , pages 110, 196 In Sikhism, the guru tradition has played a key role since its founding in the 15th century, its founder is referred to as Guru Nanak, and its scripture as Guru Granth Sahib.William Owen Cole (1982), The Guru in Sikhism, Darton Longman & Todd, , pages 1–4 The guru concept has thrived in Vajrayāna Buddhism, where the tantric guru is considered a figure to worship and whose instructions should never be violated.

Definition and etymology

The word (Sanskrit: ), a noun, connotes "teacher" in Sanskrit, but in ancient Indian traditions it has contextual meanings with significance beyond what teacher means in English. Beyond a teacher of specific knowledge, "guru" in Sanskrit refers to someone who dispels darkness. Here, darkness denotes the ignorance in the person, due to lack of higher knowledge and because of which the person is continuously rotating in cycle of birth-death instead of getting liberated.

Guru is also a "counselor, a sort of parent of mind (Citta) and Self (Atman), who helps mold values (Yamas and Niyamas) and experiential knowledge as much as specific knowledge, an exemplar in life, an inspirational source and who reveals the meaning of life." The word has the same meaning in other languages derived from or borrowing words from Sanskrit, such as Hindi, Marathi, Punjabi, Tamil, Telugu, Kannada, Malayalam, Odia, Bengali, Gujarati and Nepali. The Malayalam term Acharyan or Asan is derived from the Sanskrit word Acharya.

As a noun the word means the imparter of knowledge (jñāna; also Pali: ñāna). As an adjective, it means 'heavy,' or 'weighty,' in the sense of "heavy with knowledge," heavy with spiritual wisdom,Lipner, Julius J.,Their Religious Beliefs and Practices p.192, Routledge (UK), "heavy with spiritual weight,"Cornille, C. The Guru in Indian Catholicism (1991) p.207. Peeters Publishers "heavy with the good qualities of scriptures and realization,"Hopkins, Jeffrey Reflections on Reality (2002) p. 72. University of California Press. or "heavy with a wealth of knowledge."Varene, Jean. Yoga and the Hindu Tradition (1977). p.226. University of Chicago Press. The word has its roots in the Sanskrit gri (to invoke, or to praise), and may have a connection to the word gur, meaning 'to raise, lift up, or to make an effort'.

Sanskrit guru is cognate with Latin gravis 'heavy; grave, weighty, serious' and Greek βαρύς barus 'heavy'. All three derive from the Proto-Indo-European root *gʷerə-, specifically from the zero-grade form *gʷr̥ə-.

Darkness and light

A popular etymological theory considers the term "guru" to be based on the syllables gu () and ru (), which it claims stands for darkness and "light that dispels it", respectively. The guru is seen as the one who "dispels the darkness of ignorance."Krishnamurti, J. The Awakening of Intelligence. (1987) p.139. HarperCollins.

Reender Kranenborg disagrees, stating that darkness and light have nothing to do with the word guru. He describes this as a folk etymology.

Joel Mlecko states, "Gu means ignorance, and Ru means dispeller," with guru meaning the one who "dispels ignorance, all kinds of ignorance", ranging from spiritual to skills such as dancing, music, sports and others. Karen Pechilis states that, in the popular parlance, the "dispeller of darkness, one who points the way" definition for guru is common in the Indian tradition.Karen Pechilis (2004), The Graceful Guru, Oxford University Press, , pages 25–26

In Western Esotericism and the Science of Religion, Pierre Riffard makes a distinction between "occult" and "scientific" etymologies, citing as an example of the former the etymology of 'guru' in which the derivation is presented as gu ("darkness") and ru ('to push away'); the latter he exemplifies by "guru" with the meaning of 'heavy.'Riffard, Pierre A. in Western Esotericism and the Science of Religion Faivre A. & Hanegraaff W. (Eds.) Peeters Publishers( 1988),

In Hinduism

The Guru is an ancient and central figure in the traditions of Hinduism. Ultimate liberation or moksha and inner perfection is considered achievable in Hinduism with the help of a guru. The Guru can also serve as a teacher of skills, a counselor, one who helps in the realization of one's Self (Atma), who instills values and experiential knowledge, an exemplar, an inspiration and one who helps guide a student's (śiṣya) spiritual development. At a social and religious level, the Guru helps continue the religion and Hindu way of life. Guru thus has a historic, reverential and an important role in the Hindu culture.

Scriptures The word Guru is mentioned in the earliest layer of Vedic texts. The hymn 4.5.6 of Rigveda describes the guru as, "the source and inspirer of the knowledge of the Self, the essence of reality," for one who seeks.Sanskrit original: – Rigveda 4.5.6 WikisourceEnglish Translation: Joel Mlecko (1982), The Guru in Hindu Tradition Numen, Volume 29, Fasc. 1, page 35

In chapter 4.4 within the Chandogya Upanishad, a guru is described as one whom one attains knowledge that matters, the insights that lead to Self-knowledge. Verse 1.2.8 of the Katha Upanisad declares the guru "as indispensable to the acquisition of knowledge."English Translation: Joel Mlecko (1982), The Guru in Hindu Tradition Numen, Volume 29, Fasc. 1, pages 35–36 In chapter 3 of Taittiriya Upanishad, human knowledge is described as that which connects the teacher and the student through the medium of exposition, just like a child is the connecting link between the father and the mother through the medium of procreation.Paul Deussen, Sixty Upanishads of the Veda, Volume 1, Motilal Banarsidass, , pages 222–223Taittiriya Upanishad SS Sastri (Translator), The Aitereya and Taittiriya Upanishad, pages 65–67 In the Taittiriya Upanishad, the guru then urges a student to "struggle, discover and experience the Truth, which is the source, stay and end of the universe."

The ancient tradition of reverence for the guru in Hindu scriptures is apparent in 6.23 of the Shvetashvatara Upanishad, which equates the need of reverence and devotion for guru to be the same as for god,Robert Hume (1921), Shvetashvatara Upanishad 6.23, The Thirteen Principal Upanishads, Oxford University Press, page 411Joel Mlecko (1982), The Guru in Hindu Tradition Numen, Volume 29, Fasc. 1, page 37

The Bhagavad Gita also exemplifies the importance of a guru within Hinduism. Arjuna when faced with the realization of having to wage war with his kin is paralyzed with grief and remorse. Overwhelmed he lays down his weapons and refuses to fight. Despite his intellectual prowess and skill in warfare he finds himself lacking in Dharmic (moral) clarity. At this moment he turns to Krishna for guidance and in essence seeks Krishna as his guru. This interaction exemplifies the importance within the Hindu tradition for a disciple to seek guidance from an experienced spiritual guru. Additionally, other references to the role of a guru in the Bhagavad Gita include verse 4.34 – those who know their subject well are eager for good students, and the student can learn from such a guru through reverence, service, effort and the process of inquiry.Christopher Key Chapple (Editor) and Winthrop Sargeant (Translator), The Bhagavad Gita: Twenty-fifth–Anniversary Edition, State University of New York Press, , page 234Jeaneane D. Fowler (2012), The Bhagavad Gita, Sussex Academic Press, , page 87

Capabilities, role and methods for helping a student

The 8th century Hindu text Upadesasahasri of the Advaita Vedanta philosopher Adi Shankara discusses the role of the guru in assessing and guiding students. In Chapter 1, he states that teacher is the pilot as the student walks in the journey of knowledge, he is the raft as the student rows. The text describes the need, role and characteristics of a teacher, as follows,

Adi Shankara presents a series of examples wherein he asserts that the best way to guide a student is not to give immediate answers, but posit dialogue-driven questions that enable the student to discover and understand the answer.Sanskrit: Upadesha sahasri;English Translation: S Jagadananda (Translator, 1949), Upadeshasahasri, Vedanta Press, , prose section, page 43;

Reverence and Guru-Bhakti Reverence for the guru is a fundamental principle in Hinduism, as illustrated in the Guru Gita by the following shloka

Other notable examples of devotion to the guru within Hinduism include the religious festival of Guru Purnima.

Gurukula and the guru-shishya tradition