heart of his Protestant manifesto on theology and piety. What is even more interesting is the way he does so: through the concept of Trinitarian koinōnia. The Greek word koinōnia (used by St Paul to mean human participation in God’s life) suggests an entirely distinctive way of conceiving of the relationship between God and humanity. The purpose of this book is to consider what koinōnia might mean for us in a century fractured by individualism, reductionism, and fundamentalism, and to consider what