Sahaja

Sahaja ( ) means spontaneous enlightenment in Indian and Tibetan Buddhist spirituality. Sahaja practices first arose in Bengal during the 8th century among Buddhist yogis called Sahajiya siddhas.
Ananda Coomaraswamy describes its significance as "the last achievement of all thought", and "a recognition of the identity of spirit and matter, subject and object", continuing "There is then no sacred or profane, spiritual or sensual, but everything that lives is pure and void."
Etymology.
The Sanskrit [and the Tibetan, which precisely follows it] literally means: 'born or produced together or at the same time as. Congenital, innate, hereditary, original, natural (...by birth, by nature, naturally...)'.
Etymologically, "saḥ-" means 'together with', and "ja" derives from the root "jan", meaning 'to be born, produced, to occur, to happen'. The Tibetan "lhan cig tu skye ba" is an exact etymological equivalent of the Sanskrit. "Lhan cig" means 'together with', and "skye ba" means 'to be born, to arise, to come about, to be produced'. The Tibetan can function as verbal phrase, noun, or adjective.
Origins and Buddhist Sahajayana.
The Buddhist siddha Saraha (8th century CE) was the founder of the Buddhist movement termed "Sahajayana" which flourished in Bengal and Odisha. Sahajiya mahasiddhas like Saraha, Kanha, Savari and Luipa were tantric Buddhists who expounded their beliefs in songs and dohas in the Apabhraṃśa languages and Bengali. Many of the songs in this tradition are preserved in the Charyapada.
Sahajiyas such as Saraha believed that enlightenment could be achieved in this lifetime, by laypersons living in samsara. The sahajiyas practiced a form of ritual union which was supposed to bring the female and male elements together in balance.
Saraha and his disciples were also master practitioners of Mahamudra meditation, and Saraha composed a famous Mahamudra meditation text along with his 'Three Cycles of Doha', a series of yogic songs. Sahajiyas also criticized the Hindu caste system. Sahajayana Buddhism became very popular in the Pala Empire, especially among commoners.
One of the classic texts associated with the Sahajiya Buddhists is the Hevajra Tantra. The tantra describes four kinds of Joy (ecstasy):
"From Joy there is some bliss, from Perfect Joy yet more. From the Joy of Cessation comes a passionless state. The Joy of Sahaja is finality. The first comes by desire for contact, the second by desire for bliss, the third from the passing of passion, and by this means the fourth [Sahaja] is realized. Perfect Joy is samsara [mystic union]. The Joy of Cessation is nirvana. Then there is a plain Joy between the two. Sahaja is free of them all. For there is neither desire nor absence of desire, nor a middle to be obtained."
The siddhi, Indrabhuti, wrote a commentary on Sahaja teachings called the "Sahajasiddhipaddhati."
In the Nāth tradition.
"Sahaja" is one of the four keywords of the Nath sampradaya along with Svecchachara, Sama, and Samarasa. "Sahaja" meditation and worship was prevalent in Tantric traditions common to Hinduism and Buddhism in Bengal as early as the 8th–9th centuries. The British Nath teacher Mahendranath wrote:
The concept of a spontaneous spirituality entered Hinduism with Nath yogis such as Gorakshanath and was often alluded to indirectly and symbolically in the twilight language ("sandhya bhasa") common to sahaja traditions as found in the "Charyapada" and works by Matsyendranath and Daripada. It influenced the bhakti movement through the Sant tradition, exemplified by the Bauls of Bengal, NamdevDnyaneshwar, Meera, Kabir and Guru Nanak, the founder of Sikhism.
Yoga in particular had a quickening influence on the various Sahajiya traditions. The culture of the body ("kāya-sādhana") through processes of Haṭha-yoga was of paramount importance in the Nāth sect and found in all sahaja schools. Whether conceived of as 'supreme bliss' (Mahā-sukha), as by the Buddhist Sahajiyās, or as 'supreme love' (as with the Vaiṣṇava Sahajiyās), strength of the body was deemed necessary to stand such a supreme realisation.
Vaishnava-Sahajiya.
The "Vaishnava-Sahajiya" sect became popular in 17th century Bengal. It sought religious experience through the five senses. The divine relationship between Krishna and Radha (guises of the divine masculine and divine feminine) had been celebrated by Chandidas (Bangla: চন্ডীদাস) (born 1408 CE), Jayadeva (circa 1200 CE) and Vidyapati (c 1352 - c 1448) whose works foreshadowed the "rasas" or "flavours" of love. The two aspects of absolute reality were explained as the eternal enjoyer and the enjoyed, Kṛṣṇa and Rādhā conceived of as ontological principles of which all men and women are physical manifestations, as may be realised through a process of attribution ("Aropa"), in which the sexual intercourse of a human couple is transmuted into the divine love between Kṛṣṇa and Rādhā, leading to the highest spiritual realisation, the state of union or "Yugala". The element of love, the innovation of the Vaiṣṇava Sahajiyā school, is essentially based on the element of yoga in the form of physical and psychological discipline.
Vaisnava-Sahajiya is a synthesis and complex of traditions that, due to its sexual tantric practices, was perceived with disdain by other religious communities and much of the time was forced to operate in secrecy. Its literature employed an encrypted and enigmatic style. Because of the necessity of privacy and secrecy, little is definitively known about their prevalence or practices.
Sahaja-siddhi.
The "sahaja-siddhi" or the "siddhi" or "natural accomplishment" or the "accomplishment of the unconditioned natural state" was also a textual work, the "Sahaja-Siddhi" revealed by Dombi Heruka (Skt. Ḍombi Heruka or Ḍombipa) one of the eighty-four Mahasiddhas. The following quotation identifies the relationship of the 'mental flux' (mindstream) to the sahaja-siddhi. Moreover, it must be remembered that though Sundararajan & Mukerji (2003: p. 502) use a masculine pronominal the term 'siddha' is not gender-specific and that there were females, many as senior sadhakas, amongst the siddha communities:
Ramana Maharshi.
Ramana Maharshi distinguished between "kevala nirvikalpa samadhi" and "sahaja nirvikalpa samadhi":
"Kevala nirvikalpa samadhi" is temporary, whereas "sahaja nirvikalpa samadhi" is a continuous state throughout daily activity. This state seems inherently more complex than "samadhi", since it involves several aspects of life, namely external activity, internal quietude, and the relation between them. It also seems to be a more advanced state, since it comes after the mastering of "samadhi".