In a recent article Professor Phillips has argued against Mascall's contention that the role of philosophy in relation to religious belief is to justify that belief by seeking ‘rational grounds for asserting the existence of God’. In this paper I shall investigate the case Phillips presents and the argument he utilises from Winch to establish the conclusion that it is a fundamental misunderstanding to think that one could justify religious belief and I shall further point out a serious dilemma in Phillips's position on the question of religious truth. It is my claim that Phillips does not establish that Mascall's enterprise is an impossible one and that his own position in criticising Mascall leads him into the dilemma I have alluded to.