The Mazatecs say that the mushrooms speak. Now the investigators (10) from without should have listened better to the Indian wise men who had experience of what they, white ones of reason, had not. If the mushrooms are hallucinogenic, why do the Indians associate them with communication, with truth and the enunciation of meaning? An hallucination is a false perception, either visual or audible, that does not have any relation at all to reality, a fantastical illusion or delusion: what appears, but has no existence except in the mind. The vivid dreams of the psychedelic experience suggested hallucinations: such imaginations do occur in these visionary conditions, but they are marginal, not essential phenomena of a general liberation of the spontaneous, ecstatic, creative activity of conscious existence. Hallucinations predominated in the experiences of the investigators because they were passive experimenters of the transformative effect of the mushrooms. The Indian shamans are not contemplative, they are workers who actively express themselves by speaking, creators engaged in an endeavor of ontological, existential disclosure. For them, the shamanistic condition provoked by the mushrooms is intuitionary, not hallucinatory. What one envisions has an ethical relation to reality, is indeed often the path to be followed. To see is to realize, to understand. But even more important than visions for the Mazatec shaman are words as real as the realities of the real they utter. It is as if the mushrooms revealed a primordial activity of signification, for once the shaman has eaten them, he begins to speak and continues to speak throughout the shamanistic session of ecstatic language. The phenomenon most distinctive of the mushrooms' effect is the inspired capacity to speak. Those who eat them are men of language, illuminated with the spirit, who call themselves the ones who speak, those who say. The shaman, chanting in a melodic singsong, saying says at the end of each phrase of saying, is in communication with the origins of creation, the sources of the voice, and the fountains of the word, related to reality from the heart of his existential ecstasy by the active mediation of language: the articulation of meaning and experience. To call such transcendental experiences of light, vision, and speech hallucinatory is to deny that they are revelatory of reality. In the ancient codices, the colored books, the figures sit, hieroglyphs of words, holding the mushrooms of language in pairs in their hands: signs of signification.