What does it mean that the believers are ‘in Christ’ (Rom 8:1; 2 Cor 5:17 etc.)? The phrase has become so common to Christian discourse that it obscures the original meaning. By analysing key passages and stripping back the interpretive layers, this book portrays ‘in Christ’ in the light of Greek language usage. Insights from metaphor theory, onomastics, and ritual theory further the investigation. The book also addresses prepositional phrases like ‘with Christ’ and how ‘in Christ’ developed in the deutero-Pauline letters. This comprehensive perspective illuminates a crucial early-Christian phrase and how believers viewed their relationship to Christ.