Across India, readers of Sanskrit poetry and drama knew Abhinavagupta as the critic who explained what an audience feels. In his commentaries on the Nāṭyaśāstra, the old manual of theatre, and on the Dhvanyāloka, a treatise holding that poetry works chiefly by suggestion, he described the enjoyment of a play as a kind of knowing in its own right: neither the everyday awareness of someone who wants or fears something, nor the bliss of the enlightened, but a state between the two. In Kashmir he was also the theologian who gave the Śaiva Tantras, the scriptures his tradition held to be revealed by Shiva, a complete philosophy.
In tenth-century Kashmir those scriptures were contested. The Śaiva Siddhānta, the dualist school of the orthodox, read them as teaching that the soul and Shiva stay distinct for ever. Heterodox lineages, among them the Trika, read the same revelation as teaching that only one consciousness exists. Outside both camps, Buddhist logicians in the line of Dharmakīrti, the seventh-century theorist of knowledge, denied that any lasting self exists at all.
His father, Narasiṃhagupta, a learned Śaiva, taught him grammar, logic and the interpretation of texts. His mother died in his early childhood, and he counted that loss as the start of his spiritual progress. He gave up thoughts of marriage and studied with teachers of many Śaiva traditions, and with their opponents. Two mattered most. Lakṣmaṇagupta, a pupil of the Kashmiri philosopher Utpaladeva, taught him the philosophy of recognition, and Śambhunātha, the teacher he praised above all others, initiated him into the Kaula lineage, a tradition of secret rites.
The claim he is remembered for comes from that philosophy of recognition, pratyabhijñā. Utpaladeva had answered the Buddhists with an argument from memory: to remember is to join a past perception to a present one, and two passing moments, each closed on itself, cannot do that; something that lasts must hold both. In his commentary on those verses Abhinavagupta took the argument further. The knower that lasts is one free consciousness, which the Śaivas call Shiva, and it shows itself as the whole world. Liberation, then, is the recognition that one already is that consciousness. On the reading of Alexis Sanderson, the Oxford Indologist, Abhinavagupta rejected the dualism of the Siddhānta, the Vedānta doctrine that the world is illusion, and a Buddhist idealism with nothing to unite its moments, yet treated each as an approximation of his own view.
The Tantrāloka, his largest work, set out to fit every Śaiva scripture, rite and discipline into that single account. Its closing chapter tells how it came about. He had set out to teach his brother Manoratha when a few others pressed him for the whole of the Tantras, and he wrote in a house given to him by Vatsalikā, the aunt of Mandra, a minister's son who had asked him to stay in his town. His aesthetics and his theology were not separate interests. Sanderson ties them together: the Kashmiri Śaivas used dance and music in their worship, and the Kaula cults sought enlightenment not by withdrawing from the life of the senses but by contemplating it as the radiance of the self. Two shorter works are held here as well: the Parātrīśikā-vivaraṇa, a long commentary that reads a short Tantra, the Goddess questioning Bhairava, a fierce form of Shiva, as one consciousness asking itself; and the Paryantapañcāśikā, some fifty verses ascribed to him, which end by telling the seeker to let go of every method.
No year of his life is fixed. Britannica places his activity around 1014, and reference works print either about 950 to 1016 or about 975 to 1025. Kashmiri tradition tells that at the end he walked into a cave near Beerwah with his disciples, reciting his own hymn to Bhairava, and was never seen again. Kashmiri Pandits still go there on pilgrimage.
His pupil Kṣemarāja recast the system in simpler handbooks. Through them the nondual doctrine took over the worship of Svacchandabhairava, a form of Shiva, which was the basic Śaivism of the Kashmir valley. Abhinavagupta's lineage settled above all at Cidambaram, the great Śaiva temple town of Tamil Nadu, and that lineage taught that he was no mortal but an incarnation of Shiva; Tamil scholars kept writing Sanskrit works in his tradition from the eleventh century to the nineteenth. The Kashmir Series of Texts and Studies began printing the Tantrāloka in 1918, and in 2023 the Indologist Mark Dyczkowski finished a full English translation, after some forty-five years of work.