There are two considerations which make this work on the part of the Church at once imperative and hopeful. The first is that the Church is specially called upon by the command and example of its Founder to range itself on the side of the weak and helpless. It is commanded to bring the principles of brotherly love to bear upon the conditions of life which press most heavily upon the handicapped. It is called on in the spirit of its Master to rebuke the greed of gain and the callous selfishness which uses the toil, and even the degradation of others, for its own personal enjoyment. The Church only fulfils its function when {243} it is not only the consoler of the suffering but also the champion of the oppressed. And the other consideration is that in virtue of its nature and charter the Church is enabled to appeal to motives which the State cannot supply. It brings all social obligation under the comprehensive law of love. It exalts the principle of brotherhood. It lifts up the sacrifice of Christ, and seeks to make it potent over the hearts of men. It preaches the doctrine of humanity, and strives to win a response in all who are willing to acknowledge their common kinship and equality before God. It appeals to masters and servants, to employers and labourers, to rich and poor, and bids them remember that they are sharers alike of the Divine Mercy, pensioners together upon their Heavenly Father's love. 4. Whatever shape the obligation of the Church may take in regard to the social problems of the homeland, the duty of Christianity to the larger world of Humanity admits of no question. The ethical significance of the missionary movement of last century has been pronounced by Wundt,[29] the distinguished historian of morals, as the mightiest factor in modern civilisation. Speaking of humanity in its highest sense as having been brought into the world by Christianity, he mentions as its first manifestation the care of the sick, and then adds, 'the second great expression of Christian humanity is the establishment of missions.' It is unnecessary to dwell upon this modern form of unselfish enthusiasm. It has its roots in the simple necessity, on the part of the morally awakened, of sharing their best with other people. 'Man grows with the greatness of his purposes,' and no greater ideal task has ever presented itself to the imagination of man than this mighty attempt to conquer the world for Christ, and give to his brother men throughout the earth that which has raised and enriched himself.[30]