Whatever opinion Catholics may hold about the utility of the World Conference on Faith and Order recently held at Edinburgh we must at least recognize the witness it bears to a deep and growing determination on the part of Christians of widely differing allegiances to bring to an end the disastrous divisions of Christendom. This determination has given rise to a new way of approach to the problem of re-union, a new technique in dealing with the differences which divide Christians. Controversy of the old type between antagonists, who laboured without any attempt at mutual understanding or sympathy to prove themselves entirely right and their opponents entirely wrong, is of comparatively little use in attaining truth. Its place has been taken by the way of affirmation which first explores and emphasizes every possible point of agreement and by so doing clearly marks off the points at which divergence begins and how far it extends. Experience shows that such divergence is often due more to the partial or faulty presentation of truth than to perversity of mind or will in accepting it. The careful probing of historical causes can do much to prepare the way for reconciliation, by a frank acknowledgment of shortcomings where they exist and a sympathetic understanding of the false emphasis and consequent error to which such shortcomings have often given rise. This is the human and preparatory element in the work of the Reunion of Christendom; the necessary spade-work which must be done before the soil is ready for the Holy Spirit to produce the fruits of reconciliation—a perfect union of heart and mind in Christ Jesus.