First published in 1921, this title examines the relationship between what the author labels the 'rationalist' element in Western culture on the one hand, derived from the ancient Greeks, and Christianity, on the other. Bevan contends that these two traditions are distinct, but not mutually exclusive, and that to understand fully their mutuality and reciprocity it is necessary to examine the distinct history of both: their individual provenances, their fusion and interpenetration, and also, their future together.

The first chapter attempts to indicate the significance of Hellenic culture in its relation to Eastern civilisation. The extinction of Paganism at the time of Augustine is examined, as is a selection of moral issues associated with the Christian life, as that is interpreted by the author. Finally, the notion of 'progress' is investigated with specific reference to the position of Christianity in the modern world.