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In den beginne was de toorn: Het demonische bij Jacob Böhme
Ab de Jong & Aleid de Jong (eds.), Kleine Encyclopedie van de Toorn (Utrechtse Theologische Reeks 21), Utrecht 1993, 43-56.
"In the Beginning there was Wrath: Jacob Böhme and the Demonic". A structural analysis of the concept of "wrath" as a counterpart to "love" in the Christian-theosophical system of Jacob Böhme. I'm still quite pleased with it, and used it for my article "Jacob Boehme and Christian Theosophy" (2015). NO PDF AVAILABLE
New Age en cultuurkritiek
J.W. Nienhuys (ed.), Skepsis in de New Age (Skeptische Notities 9), Utrecht 1993, 1-29.
Based on a lecture I gave at a conference of the Dutch organization of skeptics. Under the title "New Age and culture criticism, I argued that New Age is best understood in terms of what it critiques than of what it affirms.NO PDF AVAILABLE