This book is for Roman Catholic and Evangelical Protestant lay people who wonder what relationship, if any, they might have with their friends who come from a different Christian faith tradition than their own. The authors aim to address that question in a practical way. They believe that while disagreements remain, it is possible to preserve the integrity of the faith while relating positively to Christians who cherish other beliefs. The opinions expressed in this book grew out of nearly thirty years of experience as evangelical protestant missionaries ministering in catholic parish communities in France. The goal of the book is to move the readers beyond simply understanding each other, to a place where they might begin using their diversity to stimulate and encourage each other in our common pursuit of obedient discipleship. We know of no other book which targets ecumenical lay relations in this way.