The goal of this guide is to assist Catholic parishioners, priests, students, seminarians, members of ecumenical groups, and any interested Christians with some of the history of ecumenicism and the progress accomplished over the last two centuries. Most importantly, though, is not only to read Fr. Crossin's book, Moving into the Ecumenical Future, but also to gather with other Christians, to learn, pray, grow spiritually, and listen to the Holy Spirit. Fr. John strongly recommends the latter, and to discern how best to move forward to make Fr. John's dream of Christian unity, a reality. No doubt this is a huge, daunting task, but great and often difficult events happen when a community listens to and cooperates with the wisdom and grace of the Holy Spirit! This guide and the book can be used in parish book clubs, discussion clubs, adult faith formation, or prayer groups. It can also be used as a course in the curriculum of Catholic high schools, Catholic colleges and universities, seminaries and divinity schools, ecumenical groups, diocesan groups, professional ecumenists, and for any community interested in the pursuit of Christian unity.