Prof Dr FJ van Zyl as mission theologian In this article, the theology of mission of Prof dr FJ van Zyl is being explored. This is done by way of his lectures in the Science of Mission at the University of Pretoria during 1960-1978 and also from articles in the magazines of the Nederduitsch Hervormde Kerk dating back approximately forty years. It is found that almost none of his dictions is outdated. The radical cataclysm in the theology of mission, especially after 1961, he sharply detected and exposed. His theology of mission is built on a very broad theological base which can be described as theology of the Word. To him mission is proclamation.