How might Christians in the natural sciences articulate their aims and motivations? Finding bearings in the themes of faith and calling, Matthew Walhout argues that traditional answers to this question tend to bind Christian thinking too strongly to objectivist rationality. He reiterates a concern registered historically in the context of Renaissance humanism, namely that Christian faith not be identified with or reduced to any philosophy of “new learning.” He criticizes two current trends—the siding of Christians with objectivists in the “science wars,” and the uncritical presumption of faith-science compatibility. Borrowing from recent work in philosophy of science, he advocates conceiving of scientific practices in terms that are not fundamentally epistemological. Mr. Walhout is Professor of Physics at Calvin College.