Graham Greene’s novels often bring religion, social class, institutional power, and personal responsibility into the same moral landscape. Critics have paid considerable attention to Greene’s Catholic imagination, but the connection between religious belief and socioeconomic inequality deserves closer attention. This paper examines Brighton Rock (1938), The Power and the Glory (1940), and The Heart of the Matter (1948) through the idea of the “religious curtain of lies.” This is an analytical metaphor used here to describe the ways religious language can sometimes hide inequality, justify authority, or turn social suffering into a matter of personal guilt. At the same time, religion can give marginalised people a sense of dignity and a language with which to question or resist oppression. Drawing on Marxist ideas about class and ideology, along with scholarship on Greene’s Catholic imagination, the paper argues that religion in Greene’s fiction cannot be placed neatly on either side of the divide between social control and spiritual freedom. It often does both. In Brighton Rock, Catholic belief is closely tied to criminal marginality, gender, and class. In The Power and the Glory, spiritual authority grows out of poverty, suffering, and political persecution. In The Heart of the Matter, Catholic conscience is shaped by the moral contradictions of British colonial rule. Greene therefore presents religious belief as deeply conflicted. It can support existing hierarchies, but it can also expose their cruelty and moral failure. His importance as a novelist lies partly in the way he brings social structures and individual conscience into constant tension. The “religious curtain of lies” does not mean that religion itself is deceptive. Rather, it provides a way of asking when religious narratives hide material inequality and when they help us see that inequality more clearly.