But let us come back to what after all is the only true guarantee and the only condition of reunion—the achievement of holiness; that holiness needs, as we have seen, to be safeguarded, and the safeguarding of it is peculiarly entrusted to us, the ministers of the Church. What need then for personal dedication! For upon the degree in which we are wholly given to our work depends in large measure the time when God will reunite His Church. We keep separate even from many right activities, but only in order to keep pure that spirit by which we are to permeate the whole life of the world, bringing it to bear, so far as we are able in our detachment, upon every sort of problem, private or public—industrial, commercial, political, international—till at last the whole world is governed by that spirit, and there is no need for separation any more nor for any special place of worship nor special order of religious ministers; for then the world and the Church will be indistinguishable in the Holy City of God, wherein is no temple, because the Lord God Almighty and the Lamb are the temple of it. *LECTURE V* *THE CITIZENSHIP OF HEAVEN* "Our citizenship is in heaven."—Philippians iii. 20. "He that hath seen me hath seen the Father."—S. John xiv. 9. We have considered in outline the functions of the State and of the Church, the two great instruments of God for the furthering of His kingdom. Let us now turn to consider, still in mere outline, for nothing more is possible, the nature of that Kingdom itself. There are very many ways in which the subject might be approached, but I think that it will be most consonant with the general line of our thought in these meditations that we should consider it as the home of man’s spirit, the fulfilment of his spiritual being. And to that end, inasmuch as the Kingdom can only be known by living according to the principles of its citizenship, and our present effort is by its very nature intellectual only, we must try to reach it in thought as the goal towards which the whole spiritual life of man is tending. No life can be set forth in scientific terms. The moment it is analysed, the vitalising power is gone. And even the poet, who has far more chance than the logician of making us realise what the life signifies for those who live it, is still speaking of it from outside. It is only by life itself that we can truly know the Kingdom of God.