The Merutantra is a rich text within the realm of tantric literature. It presents a highly sophisticated and organised system of practices. Although it is a later tantra, it is clear from its structure and language that it represents a mature and well-established tradition. Composed in high Sanskrit, the text embodies the fullness of the tantric system, infused with the teachings of Śrīvidyā and an integration of various philosophical and ritualistic elements. The tantra reflects an intricate blend of both Śaiva, Śākta and Vaiṣṇava traditions.
The Merutantra is thought to have emerged during a period when Śrīvidyā practices were flourishing in South India, likely within a Brahmanical context. The tantra itself presents an elaborate framework for the practice of mantras, rituals, sādhana, and initiation. The text is complete and includes numerous references to the well-known Mahāvidyās, revealing an advanced understanding of tantric deities.
The tantra addresses a variety of important social and philosophical matters, including caste considerations, the role of women, and the significance of purifying rituals, while discussing the essential methods for achieving siddhi, spiritual realisation through the refinement and purification of the practitioner.
The Merutantra makes a clear distinction between right-hand path and left-hand path practices, providing guidance on how each path should be approached. It offers significant clarification on the role of various social groups, including cāṇḍālas, and provides ritual recommendations for tāntrikas, dvijas, and women, asserting that every practitioner, regardless of background, has the potential to attain siddhi through proper guidance and practice.
One of the most intriguing aspects of the Merutantra is its exploration of mantraśuddhi (mantra purification). The text explains the process of purifying mantras, especially in the case of curses or obstacles, through rituals such as the visualisation of nectar and the work with cakras. It highlights the central role of the sound and vibration inherent in tantric practice.
The Merutantra provides a detailed analysis of pūjā and sādhana techniques, offering clear instructions on performing various nyāsas, the infusion of mantra syllables into the subtle body. It offers a detailed description of puraścaraṇa or preliminary practice, the systematic repetition of mantras for prescribed periods of time. The tantra outlines a five-fold structure for pūraścaraṇa, similar to that found in Śrīvidyā, highlighting key elements such as the use of sāmānārghya (the general water offering) and the creation of sacred maṇḍalas.
The creation of the sarvatobhadramaṇḍala using coloured powders is discussed in great detail, along with the intricate nature of tantric visualisations and the importance of both external and internal purity. The tantra describes the yogapīṭha (the yogic seat) within the body, where the practitioner visualises the deity seated within the physical temple of the body and conducts the appropriate nyāsas to establish the sacred presence of the syllables and deities in the subtle body.
A central theme within the Merutantra is the initiation process. It stresses the role of the guru in guiding the student through the practices. The guru is not merely an external guide; he or she is the guiding light in awakening the internal workings of the disciple, igniting spiritual processes both externally (through rituals like homa) and internally (through mantra and visualisation practices). This connection is at the heart of the guru–śiṣya (teacher–student) relationship, which forms the foundation of tantric sādhanā.
The tantra further describes the various forms of dīkṣā (initiation), each with its specific purpose and function. The distinctions between kriyāmayī-dīkṣā (initiation through action), varṇamayī-dīkṣā (initiation through sound), and kalā-dīkṣā (initiation through the aspects of energy) are presented alongside a discussion on the distinctions between aveda-dīkṣā and vedamayī-dīkṣā. Other specific forms such as vāg-dīkṣā (initiation through speech), dṛg-dīkṣā (initiation through the gaze), and sparśa-dīkṣā (initiation through touch) are also discussed, indicating the diverse ways in which divine energy can be transmitted and experienced.
The Merutantra contains a profound understanding of the Mahāvidyās and other deities. It details the various mantras and practices associated with Kāmadeva (the god of love) and Rati, alongside a rich description of mudrās or sacred gestures. In chapters 17-19, special focus is given to Kāmadeva, with detailed sādhana instructions, including reciting specific mantras while brushing one's teeth: a simple act becomes a practice.
The tantra also includes fascinating insights into the navāvaraṇa-pūjā, revealing how the Merutantra almost mirrors the present-day practices of Śrīvidyā. It outlines the siddhi that manifests through consistent practice, including a detailed account of signs observed in dreams as well as external omens. The tantra meticulously details the process of bhūtaśuddhi (purification of the elements) and guides practitioners on how to purify the pāpapūruṣa (sinful entity) located in the abdominal region, followed by the pouring of nectar into the subtle body channels.
The Merutantra also introduces a wide range of prayogas (tantric applications) and sādhana techniques. In Chapter 11, the text describes extraordinary practices, such as utilising kuṇḍalinī to consume an enemy, while also presenting methods for achieving jīvanmukti (liberation while alive) for gṛhasthas (householders). It even touches on topics like what to do when leaving a guru and the punishments for harming the spiritual teacher, explaining the sacred bond between the guru and disciple.
Among the more unique practices are those associated with Tārā and other deities such as Buddha, Rāma, Kṛṣṇa, and Nṛsiṃha, all detailed with specific sādhana instructions. Tārā, in particular, is explored in depth, with instructions on nyāsa and the chanting of her mantra, showing a clear Vajrayāna influence especially in the context of the Akṣobhya and Ekajaṭā traditions.