The most recent contribution to the church's quest for Christian unity, One Baptism was a decade in the making. It is a study document from the World Council of Churches' Commission on Faith and Order that invites further dialogue among Christians concerning baptism within the One Church of Jesus Christ. This new text takes its place in the long line of Faith and Order Papers (it is number 210), finding inspiration most directly from the 1982 Agreed Statement Baptism, Eucharist and Ministry (BEM) and the churches' responses to it. The present study explores the close relationship between baptism and the believer's lifelong growth in Christ, suggesting that this link provides a strong argument for greater mutual recognition of baptism. The book also addresses issues in baptismal understanding and practice that cause controversies within and among churches and hinder mutual recognition.