In this thesis the author explores how traditional Lutheran law and gospel theology can be the foundation for preaching in the twenty-first century. The journey begins by analyzing contemporary society in the western world, specifically by asking the question: what characterizes our time and how does such an analysis challenge the preacher? Given that context, the author then encounters anew the theology of Martin Luther and other sixteenth-century reformers. Such engagement prompts further questions, such as: what is the core of law and gospel theology and what pitfalls do we need to be aware of when employing such insights in the twenty-first century? Shaped by Gustav Wingren’s approach to law and gospel, the author suggests the interpretation of law as an invitation to live in relation and gospel as giving courage to live in the same. The thesis concludes with a suggested method for crafting sermons that is based on findings gained by this study.