This title tests the explanatory and descriptive power of the doctrine of sin in relation to two concrete situations: sexual abuse of children and the Holocaust. Taking seriously the explanatory power of secular discourses for analyzing and regulating therapeutic action in relation to such situations, the author asks whether the theological language of sin can offer further illumination by speaking of God and the world together. Through the text's discussion of abuse and the Holocaust, an engagement with Augustine, original sin and feminism, an insight is offered into both the theology of sin and the pathologies under consideration. The understanding of sin that emerges is centred on joyful worship of the trinitarian God. This essay is more systematic and more theological than most practical, pastoral or applied theology and more practical and concrete than most systematic or constructive theology. It is a genuinely concrete, systematic theology.