Lesslie Newbigin remains one of the most important missionary theologians of the twentieth century. In responding to the challenges of late modernity, he developed a fresh paradigm of missionary theology and cultural engagement that continues to be compelling and prophetic. This book also explores the way in which Michael Polanyi's understanding of "personal knowledge" helps to give language and metaphor to Newbigin's convictions about cultural engagement and responsive witness and suggests vibrant insights and applications for mission today.