As one example architecture may be mentioned. Architecture furnishes _the envelope for the social life_, the dwelling, the nest of the family, the workshops that house the vocational life, the public buildings that provide a habitation for the political life, the temples, the churches that enshrine the religious life. The relation of the enshrining dwelling to the inner social life should be the same as that of the body to the soul in sculpture. That which goes on within should be significantly indicated externally. The progress of architecture will depend on its holding fast to this idea, and changing the outside as the inner life changes. Thus, we have, or are beginning to have, a conception of the family very different from that which prevailed at the time when the princely mansions of the Renaissance were built. To reproduce these princely mansions because they beautifully expressed the princely idea is a mistake. To provide a proper dwelling-place for the modern family the architect should clearly apprehend what functions go on in the family, what the distribution of functions should be, and the rank to be assigned to the different functions. There is to be, for instance, in addition to the ordinary requirements, provision for separate study rooms, places of retirement, refuges of intellectual solitude for the adult members; a playroom for children, a place of reunion for the household religion. The formation of a number of families into a larger group (_vid. supra_) would help in the solution of this problem. In like manner the conception of what a religious society should be is changing. The church-building, the Mosque, the Synagogue, certainly no longer declare the spirit and the purpose that animate the new religious fellowships that are forming among us today. The progress of architecture will thus depend, not on the out of hand invention of new styles, but on a thorough understanding of _the new kind of life which is to be domiciled within buildings_, accepting this as the empirical substratum, and articulating it in accordance with the spiritual relation of give and take between the parts; and the architect will assist in clarifying the ideal of the new kind of life that is to be lived within the buildings by endeavoring to give it outward expression.