" ... That they all may be one, as You, Father, are in Me, and I in You; that they also may be one in Us ... " (John 17:21)How is our Christian faith properly lived? Is Christianity a series of abstract teachings to which we, as individuals, give our mental or emotional assent? Or, as the future Russian Orthodox Archbishop and sainted martyr Ilarion (Troitsky) writes here, is the true aim of Christian life the transformation of our whole being as members of the Body of Christ, His Church?This classic translation is refreshed for the first time with updated typesetting and interior design. Questions for group discussion or personal reflection have been added as well as a biography of the author, subject and Scripture indexes.