This article explains Martin Heidegger's notorious fourfold (Geviert) as the intersection of two distinct dualisms in Heidegger's philosophy. The role of the fourfold in Heidegger's concept of “the thing” is discussed in especial detail.
Harman, G. (2002). Tool-being: Heidegger and the metaphysics of objects . Chicago: Open Court.
2.
Harman, G. (2007). On vicarious causation. Collapse: Philosophical Research and Development, 2, 187-221.
3.
Heidegger, M. (1954). Bauen Wohnen Denken. In Vorträge und Aufsätze. Pfullingen, Gremany: Verlag Günther Neske.
4.
Heidegger, M. (1986). Sein und Zeit. Tübingen, Germany: Max Niemeyer Verlag. (Original work published 1927)
5.
Heidegger, M. (1994). Einblick in das was ist. In Bremer und Freiburger Vorträge. Frankfurt, Germany: Vittorio Klostermann. (Original work published 1949)
6.
Heidegger, M. (1998). What is metaphysics? In Pathmarks (W. McNeill, Trans.). Cambridge, UK: Cambridge University Press. (Original work published 1929 )
7.
Heidegger, M. (2008). Towards the definition of philosophy (T. Sadler, Trans.). London: Continuum. (Original work published 1919)
8.
Husserl, E. (1970). Logical investigations. (J. N. Findlay, Trans.)London: Routledge & Kegan Paul . (Original work published 1901)
9.
Mattei, J.-F. (2001). Heidegger et Hölderlin: Le quadriparti. Paris: Presses Universitaires de France.
