No single element of the Rig Veda has been more debated than Soma. Pressed, filtered through wool, mixed with milk, and offered to Indra and the other deified forces before being drunk by the officiants themselves, Soma produces states the hymns describe unambiguously: expanded vision, contact with Truth, a feeling of immortality, the dissolution of ordinary boundaries of the self.
The plant itself was never named directly in a way that later tradition could preserve — and by the time of the Brahmanas, centuries afterward, the priests themselves no longer knew which plant it had been, and substitutes were already in use. This gap between direct hymnic testimony and later ignorance is itself telling. The effects described — rapid onset, radical alteration of perception, a substance gathered from mountain regions and traded down to the plains — point toward an entheogenic mushroom, most plausibly a psilocybe species, rather than any of the herbal substitutes later traditions proposed.
The ninth mandala, devoted almost entirely to Soma, reads less like a hymn to a beverage than a manual of ecstatic experience — evidence that Illumination, in the Sapta Sindhu world, was not only a philosophical concept but a lived, induced state.
Why the traditional identifications of Soma don’t hold up, and what the ninth mandala really describes — it’s all unpacked hymn by hymn in The 7 Rivers Civilization and Understanding the Rig Veda. [→ Discover the books]