The topic I was asked to address in this talk is the relation between Reformed theology and Christian philosophy. I am happy to do so. As many of you know, beginning in the 1970`s in the United States there was a tremendous surge of interest in Christian philosophy. In 1978 the Society of Christian Philosophers was formed; shortly thereafter it sponsored a new journal, Faithand Philosophy. The interest has continued; the Society now has around nine hundred members. In recent years interest has spread around the world; I understand that there is now a Society of Christian Philosophers here in Korea. The movement in the United States has been extraordinarily ecumenical. The only requirement for membership in the Society is that the applicant declare himself or herself to be a Christian -not any particular kind of Christian, just a Christian. I think no one would dispute, however, that the two dominant influences on the movement have been the Catholic tradition and the Reformed tradition. I will divide my talk into two mam parts. First, what is it about the Reformed tradition that encourages the study and practice of philosophy? And second, in what way does the Reformed tradition shape how philosophers who are members of the tradition engage in their discipline? Notice that I have framed these questions in terms of the influence of the Reformed tradition rather than the influence of Reformed theology. What we are dealing with here is not just the influence of Reformed theology but the influence of a broader Reformed way of thinking, a mentality.