harmonious forms and methods; that disdain of appearances, that yearning for truth, that attachment to abstract, bare ideas which develop conscience in him at the expense of everything else. Here the search comes to an end. We have reached a certain primitive disposition, a particular trait belonging to sensations of all kinds, to every conception peculiar to an age or to a race, to characteristics inseparable from every idea and feeling that stir in the human breast. Such are the grand causes, for these are universal and permanent causes, present in every case and at every moment, everywhere, and always active, indestructible, and inevitably dominant in the end, since, whatever accidents cross their path, being limited and partial, end in yielding to the obscure and incessant repetition of their energy; so that the general structure of things and all the main features of events are their work, all religions and philosophies, all poetic and industrial systems, all forms of society and of the family, all, in fine, being imprints bearing the stamp of their seal. IV. Chief causes of thought and feeling. Their historical effects There is, then, a system in human ideas and sentiments, the prime motor of which consists in general traits, certain characteristics of thought and feeling common to men belonging to a particular race, epoch, or country. Just as crystals in mineralogy, whatever their diversity, proceed from a few simple physical forms, so do civilizations in history, however these may differ, proceed from a few spiritual forms. One is explained by a primitive geometrical element as the other is explained by a primitive psychological element. In order to comprehend the entire group of mineralogical species we must first study a regular solid in the general, its facets and angles, and observe in this abridged form the innumerable transformations of which it is susceptible. In like manner, if we would comprehend the entire group of historic varieties we must consider beforehand a human soul in the general, with its two or three fundamental faculties, and, in this abridgment, observe the principal forms it may present. This sort of ideal tableau, the geometrical as well as psychological, is not very complex, and we soon detect the limitations of organic conditions to which civilizations, the same as crystals, are forcibly confined. What do we find in man at the point of departure? Images or representations of objects, namely, that which floats before him internally, lasts a certain time, is effaced, and then returns after contemplating this or that tree or animal, in short, some sensible object. This forms the material basis of the rest and the development of this material basis is twofold, speculative or positive, just as these representations end in a general conception or in an active resolution. Such is man, summarily abridged. It is here, within these narrow confines, that human