Agama (Hinduism) in the context of Saiva Siddhanta

Hinduism (/ˈhɪnduˌɪzəm/) is an umbrella term for a range of Indian religious and spiritual traditions (sampradayas) that are unified by adherence to the concept of dharma, a cosmic order maintained by its followers through rituals and righteous living, as expounded in the Vedas. The word Hindu is an exonym, and while Hinduism has been called the oldest surviving religion in the world, it is also described by the 19th century term Sanātana Dharma (lit. 'eternal dharma'). Vaidika Dharma (lit. 'Vedic dharma') and Arya Dharma are historical endonyms for Hinduism.

Hinduism entails diverse systems of thought, marked by a range of shared concepts that discuss theology, mythology, and other topics in textual sources. Hindu texts have been classified into Śruti (lit. 'heard') and Smṛti (lit. 'remembered'). The major Hindu scriptures are the Vedas, the Upanishads, the Puranas, the Mahabharata (including the Bhagavad Gita), the Ramayana, and the Agamas. Prominent themes in Hindu beliefs include karma (action, intent and consequences), saṃsāra (the cycle of death and rebirth) and the four Puruṣārthas, proper goals or aims of human life, namely: dharma (ethics/duties), artha (prosperity/work), kama (desires/passions) and moksha (liberation/emancipation from passions and ultimately saṃsāra). Hindu religious practices include devotion (bhakti), worship (puja), sacrificial rites (yajna), and meditation (dhyana) and Yoga. Hinduism has no central doctrinal authority and many Hindus do not claim to belong to any denomination. However, scholarly studies notify four major denominations: Shaivism, Vaishnavism, Shaktism and Smartism. The six Āstika schools of Hindu philosophy that recognise the authority of the Vedas are: Sankhya, Yoga, Nyaya, Vaisheshika, Mīmāṃsā, and Vedanta.

Shaiva Siddhanta (IAST: Śaiva-siddhānta) (Tamil: சைவ சித்தாந்தம் "Caiva cittāntam") is a form of Shaivism from South India and Sri Lanka that propounds a dualistic philosophy where the ultimate and ideal goal of a being is to become an enlightened soul through Shiva's grace. It draws primarily on the Tamil devotional hymns written by Shaiva saints from the 5th to the 9th century, known in their collected form as Tirumurai. Meykandadevar (13th century) was the first systematic philosopher of the school. The normative rites, cosmology and theology of Shaiva Siddhanta draw upon a combination of Agamas and Vedic scriptures.

This tradition is thought to have been once practiced all over Greater India, but the Muslim subjugation of North India restricted Shaiva Siddhanta to the south where it merged with the Tamil Shaiva movement expressed in the bhakti poetry of the Nayanars which was the first reaction against the nastika philosophies. Today, Shaiva Siddhanta has adherents predominantly in South India and Sri Lanka, and in a Tantrayana syncretised form in Indonesia (as Siwa Siddhanta).

The guru–shishya tradition, or parampara (lit. 'lineage'), denotes a succession of teachers and disciples in Indian-origin religions such as Hinduism, Jainism, Sikhism and Buddhism (including Tibetan and Zen traditions). Each parampara belongs to a specific sampradaya, and may have its own gurukulas for teaching, which might be based at akharas, gompas, mathas, viharas or temples. It is the tradition of spiritual relationship and mentoring where teachings are transmitted from a guru, teacher, (Sanskrit: गुरु) or lama, to a śiṣya (Sanskrit: शिष्य, disciple), shramana (seeker), or chela (follower), after the formal diksha (initiation). Such knowledge, whether agamic, spiritual, scriptural, architectural, musical, arts or martial arts, is imparted through the developing relationship between the guru and the disciple.

It is considered that this relationship, based on the genuineness of the guru and the respect, commitment, devotion and obedience of the student, is the best way for subtle or advanced knowledge to be conveyed. The student eventually masters the knowledge that the guru embodies.

Adi Shankara (8th c. CE), also called Adi Shankaracharya (Sanskrit: आदि शङ्कर, आदि शङ्कराचार्य, romanized: Ādi Śaṅkara, Ādi Śaṅkarācārya, lit. 'First Shankaracharya', pronounced [aːd̪i ɕɐŋkɐraːt͡ɕaːrjɐ]), was an Indian Vedic scholar, philosopher and teacher (acharya) of Advaita Vedanta. While he is often revered as the most important Indian philosopher, reliable information on Shankara's actual life is scant, and the historical influence of his works on Hindu intellectual thought has been questioned. The historical Shankara was probably relatively unknown and Vaishna-oriented. His true impact lies in his "iconic representation of Hindu religion and culture," despite the fact that most Hindus do not adhere to Advaita Vedanta.

Until the 10th century Shankara was overshadowed by his older contemporary Maṇḍana Miśra, and there is no mention of him in concurrent Hindu, Buddhist or Jain sources until the 11th century. The legendary Shankara was created in the 14th century, centuries after his death, when Sringeri matha started to receive patronage from the emperors of the Vijayanagara Empire and shifted their allegiance from Advaitic Agamic Shaivism to Brahmanical Advaita orthodoxy. Hagiographies dating from the 14th-17th centuries deified him as a ruler-renunciate, travelling on a digvijaya (conquest of the four quarters) across the Indian subcontinent to propagate his philosophy, defeating his opponents in theological debates. These hagiographies portray him as founding four mathas (monasteries), and Adi Shankara also came to be regarded as the organiser of the Dashanami monastic order, and the unifier of the Shanmata tradition of worship. The title of Shankaracharya, used by heads of certain monasteries in India, is derived from his name. Tradition also portrays him as the one who reconciled the various sects (Vaishnavism, Shaivism, and Shaktism) with the introduction of the Pañcāyatana form of worship, the simultaneous worship of five deities – Ganesha, Surya, Vishnu, Shiva and Devi, arguing that all deities were but different forms of the one Brahman, the invisible Supreme Being.