In a recent contribution to this journal Loughlin (2011) reflected on the place of wonder in Newman's education. This instructive piece followed a pattern in which Newman is regarded as having made positive contributions to educational debates. It is this pattern or assumption about Newman's contribution to education, particularly for the theory or philosophy of Catholic education that will be the focus in this article. It will be explained that there is some ambiguity over how much Newman's arguments for liberal education are actually grounded in more general theological arguments about the distinctive nature of Catholic education. In what follows it will be argued that a more general analysis of Newman on education draws attention to a wider issue concerning what ought to be the relationship between theology and the theory or philosophy of education. It will be proposed that Newman down played the role of theology in defending liberal education and this has implications for those who might want to appeal to him now in terms of guiding debates about the philosophy of Catholic education.