The two authors come apart here, not simply because Ruse is a nonbeliever and Davies a practicing Christian. Ruse was raised a Quaker and so, thinking theologically, he thinks in a Quaker context. More than anything he is accepting (or he would be if he were still a believer) of apophatic theology. One cannot say what God is but rather what He is not. How one works out the details of the Trinity are not that important. One is committed to the Trinity on faith, and for the rest – “now we see through a glass darkly.” For Davies, by contrast, theology is grounded in the thinking of the great theologians. He believes one can make progress on understanding the Trinity. Here is where the clash comes, not so much because Ruse is a nonbeliever, but because his theology tells him that all such attempts as those of Davies are bound to fail. 1 + 1 + 1 ≠ 1.