Shall we then say that, being sentimental and rational at once, this morality is not definite in character? Is it merely an eclectic attempt at conciliation?--Eclecticism in a certain sense would not frighten Comte. Positive philosophy flatters itself on being just in regard to its predecessors. It takes pleasure in praising each of them for the portion of truth which it contains. But, in the present case there is no occasion for it to be eclectic. It suffices for it to be relative, and, since it is a question of moral and social things, to appeal to history. Thus we see that the sentimental and the rational principles in no way exclude each other. From the historical point of view, that is to say, if we consider the genesis of morality, the latter finds birth in the sympathetic _feelings_ which man, like many other animals, experiences, and which are spontaneously developed in domestic affection and in social life. How is it that subsequently this morality evolves, that friendly relations grow indefinitely in relative importance, in spite of the inborn strength of selfishness, that humanity, in a word, should gradually rise above animality? Without any doubt, that is due to the development of _intelligence_, itself bound up with the efforts which man is obliged to make to adapt himself to the “_milieu_” in which he lives. Instinctive in its animal origin, morality becomes rational in its human evolution. We can say as much of language, of art, of science, and even of religion. All this was in embryo in the primitive nature of man, since nothing absolutely new ever appears in it. All this only manifested itself under pressure from external order, which, consciously or unconsciously, is always being exercised. Only when we know this order, we can make use of our science to turn the natural forces to our own ends, which in themselves are rational. It is in this way that systematic morality is substituted to spontaneous morality.