Written by Rimbaud at the age of 16, in the heart of the period of social experimentation and egalitarianism that was the Commune, The Letters of the Seer constitute the most revolutionary document of the modern poetry. In these letters addressed to his teacher Georges Izambard and to the poet Paul Démeny, Rimbaud already states the founding principles of his work. The literary manifesto of a man who gave a form to the formlessness and made the poetic word a powerful instrument of liberation.