MARTEN KUILMAN (Amsterdam, 1947) studied the quadruple method of thinking from its formulation in 1985 to the present day. He ventured initially – in 1981, when he abandoned a career as an exploration-geologist – in the world of oppositional thinking. The title of his first book reflected that position: ‘Observations on the borderline’.
The dynamism of higher division thinking was introduced in 1984 and a ‘search for metaphysics’ was on. The ‘Isagoge‘ (An Introduction in the quadralectic philosophy), completed in March 1986, can be regarded as a work in which the theoretical side of quadruple thinking was further developed, but the correct boundaries of visibility were not yet realized.
From cross to four – escape from regularity – St Maria de Naranco (Oviedo). King Ramiro I ordered its construction in 848 and used it as a royal palace; it was later converted into a church. Photo: Marten Kuilman (Aug. 1997).
The ‘Leerboek van de Quadralektiek’ (Textbook on Quadralectics, 1990) heralded the mastering of the subject and left ample room for creative side roads in unexplored territory. The theoretical part was fine-tuned in ‘De Vier Landen’ (The Four Countries, 1992), which gave a ‘topography of tetradic thinking’ – including maps of the mind and, in the revised version of 1997, a topography of the heavens. It all had to do with four types of visibility, which exists simultaneously in any communication.
A firm link with cultural history was established in ‘Four – A Rediscovery of the ‘Tetragonus Mundus’, which was finished (in Dutch) in 1995 and subsequently translated by the author. In particular the occurrences in other cultures were highlighted in the first part (Egypt, Greece, Rome and Europe) and more specific quadruple elements in the European history found a place in the second part. These results pose, in their overwhelming variety, a challenging corpus of work, which may act as a departure for further investigations and criticism.