A yidam or iṣṭadevatā is a meditational deity that serves as a focus for meditation and spiritual practice, said to be manifestations of Buddhahood or enlightened mind. Yidams are an integral part of Vajrayana, including Tibetan Buddhism, Chinese Esoteric Buddhism and Shingon, which emphasize the use of esoteric practices and rituals to attain enlightenment more swiftly. The yidam is one of the Three Roots of the inner refuge formula and is also the key element of deity yoga. Yidam is sometimes translated by the term "tutelary deity".
A yidam is considered to be a manifestation of enlightened qualities and a means to connect with specific aspects of the enlightened mind. The yidam is visualized during meditation in intricate detail, with the aim of internalizing its qualities and attributes. This practice is intended to facilitate the practitioner's transformation and realization of their own innate enlightened nature. It is believed to help purify the mind, accumulate positive karma, and ultimately lead to the realization of emptiness and the nature of reality.
During personal meditation practice ( sādhana), the yogi identifies their own form, attributes and mind with those of a yidam for the purpose of transformation.
Examples of yidams include the meditation deities Chakrasamvara, Kalachakra, Hevajra, Yamantaka, and Vajrayogini, all of whom have a distinctive iconography, mandala, mantra, rites of invocation and practice. Overall, yidam practices are a distinctive feature of Vajrayana, emphasizing the importance of personal connection with and transformation through specific enlightened aspects.
The Sanskrit word or a compound of iṣṭa (desired, liked, reverenced) + devatā (a deity or divine being) is a term associated with yidam in many popular books on Buddhist Tantra but has not been attested in any Buddhist tantric text in Sanskrit.where the Hindus take the Istadeva for an actual deity who has been invited to dwell in the devotee's heart, the Yidams of Tantric Buddhism are in fact the emanations of the adepts own mind. " The Tantric Mysticism of Tibet: A Practical Guide to the Theory, Purpose, and Techniques of Tantric Meditation by John Blofeld. Penguin:1992.
The iconography of the yidam carries a dynamic spectrum, reflecting the practitioner's inner disposition. This iconographic range includes the 'peaceful' form, the 'wrathful' manifestation (referred to as 'tro wa' in Tibetan), and the state of being 'neither peaceful nor wrathful' (designated as 'shi ma tro' in Tibetan). These manifestations allow practitioners to harmonize their spiritual journey with their innate nature, providing a tailored approach to self-realization. Tenzin Palmo further elaborates on this, emphasizing the connection between the practitioner's nature and the yidam's appearance.
Guidance in the selection of a yidam is traditionally provided by the guru, who offers insights into which yidam resonates best with the practitioner's aspirations and tendencies. Subsequently, the guru imparts initiation into the mandala of the chosen yidam, a process that marks the commencement of deity yoga practices. The intertwining of the guru's wisdom and the yidam's enlightened qualities creates a deep connection that strengthens the practitioner's spiritual journey. This connection underscores the notion of indivisibility, highlighting how the guru's teachings and the yidam's essence merge within the practitioner's mindstream.
The yidam's significance extends beyond mere practice; it is also perceived as the root of success in Vajrayana practice. Its transformative power lies in its representation of awakening, serving as a guide for practitioners to navigate their path toward enlightenment. Through its versatile manifestations, personalized guidance, and the seamless bond between guru and yidam, the practice of yidam becomes a cornerstone of accomplishment in Vajrayana.
Numerous iconic yidams hold a prominent place in Vajrayana practice, each representing specific enlightened qualities. Chakrasamvara, often depicted in union with his consort Vajravarahi, symbolizes the union of wisdom and compassion. Vajrakilaya embodies the fierce aspect of enlightenment, conquering obstacles and negativities. Green Tara, known for her swift compassion and protection, appeals to those seeking guidance and aid.
Vajrayana's expansive tantric pantheon offers an extensive selection of yidams, catering to a broad spectrum of practitioners. These deities encompass both peaceful and wrathful manifestations, providing practitioners with a spectrum of energies to engage with during meditation. Yamantaka, with his wrathful form, embodies the conquering of death and ignorance. Hevajra, in union with his consort Nairatmya, represents the union of emptiness and bliss.
Practitioners often gravitate toward specific yidams based on personal affinity or spiritual aspirations. This personal connection can guide practitioners towards yidams that resonate with their inner journey. Some practitioners are drawn to the wisdom of Manjushri, while others find resonance in the compassionate embrace of Avalokiteshvara.
Judith Simmer-Brown summarises:
Berzin (1997: unpaginated) in discussing Buddhist refuge commitment and bodhisattva vows frames a caution to sadhana:
In the Vajrayana practices of Tibetan Buddhism, 'safe direction', or 'refuge' is undertaken through the Three Roots, the practitioner relying on an Ishta-deva in deity yoga as a means of becoming a Buddhahood.
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