So far we have dealt largely with the past and with the various movements in the direction of unity which have been set on foot. It now remains to say something of the motives which inspire and the principles which underlie them. First and foremost is the fact that it is the will of our Lord that His people should be one. This does not mean surely any mere uniformity of organization but unity of spirit, heart, and will. We seek this chiefly because it is a right thing. Anything short of it is evil. The Christian faith rests ultimately on the Fatherhood of God and the brotherhood of man, and these can only be made real when all Christians accept them and make them the ground and basis of their relations with one another. Here we need to appeal to the conscience of the churches and challenge them to put the first things first and learn in the love of the brethren the love and service of God and His Church. Then we are bound to recognise in the next place that this unity is the prime condition of successful work and witness. The tasks awaiting the churches in the immediate future are gigantic and only as they stand together and learn to speak and act as one have they any chance of accomplishing them. They have to evangelize the world, and for this they will need above all things a common faith, a common witness, and a common sacrifice. They have to leaven society with the aims and principles of Jesus Christ, to bring His spirit to bear on all social, political, commercial, and industrial undertakings, and for this too they will need the united weight of all their influence and the passion of a great common crusade. The devil is a great master of strategy and knows that if he can keep our forces divided there is nothing in them that need be feared. We must therefore close up our ranks and present a united front, not merely as a measure of self-preservation but in order to do well the work that has been committed to us. This will involve some real self-sacrifice on the part of us all, but it is the way the Master went and His followers must not shrink from it. If we but keep our eyes fixed on the great vision of the Kingdom which He opened before us, we shall not faint but go forward steadfastly and together until the kingdoms of this world have become the Kingdom of God and of His Christ. UNITY BETWEEN CHRISTIAN DENOMINATIONS IV. THE SCOTTISH PROBLEM By the Very Rev. JAMES COOPER, D.D., Litt.D., D.C.L., V.D. The very appearance of this subject on the programme of the CAMBRIDGE SUMMER MEETING, and still more the fact that it has been entrusted to ministers of different Christian denominations--one of them, too, from across the Border--are signs of a remarkable change that has come over--we may say--the _whole Christian people_ of Great Britain.