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La metafisica è lo scandalo della filosofia: da un lato essa investe i massimi problemi ed è dunque la ragione medesima in vista della quale gli uomini hanno cominciato a fare filosofia; dall'altro è indefinibile e il suo stesso oggetto, benchè vanamente cercato, resta una perenne fonte di aporie. Nel luglio del 1929 Heidegger tenne all'Università di Friburgo, dov'era tornato come successore di Husserl, una prolusione in cui mostra in che cosa consista l'essenza della metafisica e come essa affondi le sue radici nell'esistenza dell'uomo. Sospeso tra l'essere e il nulla, l'uomo esperisce, nello stato d'animo fondamentale dell'angoscia, una motivazione originaria a interrogarsi circa il senso delle cose.
Martin Heidegger
Nació el 26 de septiembre de 1889 en Messkirch, Baden (Alemania). Cursó estudios de teología católica y después filosofía occidental en la Universidad de Friburgo, donde fue alumno de Edmund Husserl, el fundador de la fenomenología. Tras impartir clases en Marburgo, llegó a ser profesor de filosofía en Friburgo en 1928. En 1933 le nombran rector de la universidad de Friburgo y se afilia al partido nacionalsocialista (NSDAP). Renuncia al rectorado por discrepancias con el gobierno y deja de ocuparse de política. Muy influenciado por los presocráticos, por Kierkegaard, y por Nietzsche. Opinaba que la sociedad tecnológica moderna ha favorecido una actitud elemental y manipuladora que ha privado de sentido al ser y a la vida humana, un estado que llamaba nihilismo. Falleció en Messkirch el 26 de mayo de 1976.
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