Christian mission currently appears to be suffering from an acute identity crisis. This crisis has to do with at least two major factors: the increasing interdisciplinary nature of missiology and the rapid pace of change in the world around us. Each of these has significant implications for the church’s missionary task. Few would oppose in principle the efforts made to draw upon the valid findings of the various social sciences. However, there is a mounting concern among missiologists and other Christian theologians that missiology, as a discipline, should be rescued from drifting in a sea of social science data and be anchored once again to its theological foundation. How can we properly ground the church’s reflection on its missionary task again? The larger part of the answer lies in a carefully constructed biblical theology of mission. This article seeks to contribute to such a project through some insights from a detailed study of the Gospel of John's mission theology.