The distortions of Augustinian and Calvinist approaches to natural theology are noted, and the different approach of Eastern Orthodoxy is examined, especially in relation to the notion of noetic perception in the approach of Gregory of Nyssa and to its application to the contemplation of nature as understood by Maximus the Confessor. More purely ‘philosophical’ considerations are also examined, especially in relation to the ‘weight’ that is assigned to competing arguments. In this context, the concept of noetic perception is applied to the notion of ‘baptized reason’. It is suggested that in relation to the praeambula fidei approach of Thomas Aquinas, even scholastic versions of natural theology may need revision because of nuances in that work that are often unrecognized.