It is for this class to determine, in general outline, what scheme of Life the community shall accept as decent or honorific; and it is their office by precept and example to set forth this scheme of social salvation in its highest, ideal form. But the higher leisure class can exercise this quasi-sacerdotal office only under certain material limitations. The class cannot at discretion effect a sudden revolution or reversal of the popular habits of thought with respect to any of these ceremonial requirements. It takes time for any change to permeate the mass and change the habitual attitude of the people; and especially it takes time to change the habits of those classes that are socially more remote from the radiant body. The process is slower where the mobility of the population is less or where the intervals between the several classes are wider and more abrupt. But if time be allowed, the scope of the discretion of the leisure class as regards questions of form and detail in the community's scheme of life is large; while as regards the substantial principles of reputability, the changes which it can effect lie within a narrow margin of tolerance. Its example and precept carries the force of prescription for all classes below it; but in working out the precepts which are handed down as governing the form and method of reputability--in shaping the usages and the spiritual attitude of the lower classes--this authoritative prescription constantly works under the selective guidance of the canon of conspicuous waste, tempered in varying degree by the instinct of workmanship. To those norms is to be added another broad principle of human nature--the predatory animus--which in point of generality and of psychological content lies between the two just named. The effect of the latter in shaping the accepted scheme of life is yet to be discussed. The canon of reputability, then, must adapt itself to the economic circumstances, the traditions, and the degree of spiritual maturity of the particular class whose scheme of life it is to regulate. It is especially to be noted that however high its authority and however true to the fundamental requirements of reputability it may have been at its inception, a specific formal observance can under no circumstances maintain itself in force if with the lapse of time or on its transmission to a lower pecuniary class it is found to run counter to the ultimate ground of decency among civilized peoples, namely, serviceability for the purpose of an invidious comparison in pecuniary success. It is evident that these canons of expenditure have much to say in determining the standard of living for any community and for any class. It is no less evident that the standard of living which prevails at any time or at any given social altitude will in its turn have much to say as to the forms which honorific expenditure will take, and as to the degree to which this "higher" need will dominate a people's consumption.