LA PIEDRA DE LA LOCURA O LA VERDAD DEL PERCIPIENS*

since modern age, the so-called ontological-epistemic project of science, which is based on an ideal of visibility, is genealogically shaped. being transformed into a dominant disciplinary position at the end of the xix century, this project exerts an ideological influence as restrictive-normative cannon upon discourse constructions about madness. forthis reason, adiachronic-vesalian-nosological line of thought is proposed. notwithstanding, from the beginning, the debate on universal rules of visibility emerges from social sciences. the psychoanalytical discourse, proposed as representative of this line of thought, is founded on an "ethos" of saying about something "invisible", and attached to a paracelsian-pathological tradition. the author provides a hermeneutical approximation by utilizing such an iconographic reference as "the extraction of the stone of madness," of flemish painter hieronymus bosch.