At this moment, his objections were especially directed against the excessive multiplication of the faculties, and upon the insufficiency of the anatomy of the brain which accompanied the distinction of so many faculties. He thought the anatomists were right in protesting against this method of the phrenologists who, from the supposed existence of an irreducible faculty, assume the existence of a corresponding organ in the brain. But anatomy cannot thus be treated _a priori_. As the aim of every biological theory is to establish an exact harmony between anatomical analysis and physiological analysis, this evidently supposes that they are not exactly modelled upon one another, and that each one of them has been worked out in a distinct manner. We must then take up the analysis of the cerebral apparatus again, provisionally setting aside all idea of function, or at least only making use of it as an auxiliary in anatomical research.[192] In 1851, in the first volume of the _Politique positive_, Comte’s attitude is quite different. In Gall’s psychology he no longer recognises anything but what is of historical interest. His own conception of psychology is completely altered. This great change has been determined by the foundation of sociology. Undoubtedly Gall’s merit remains very great, for he rendered a service of the first order in daring to construct a positive theory of the intellectual and moral functions. Without this theory, which at first he considered to be exact in its general lines, Comte could not have undertaken to apply the positive method to social facts, nor consequently to found his philosophy. So his gratitude to Gall is almost as great as to Condorcet, “his spiritual father.” But once sociology is founded, in looking back, Comte understands that Gall’s “cerebral theory” cannot be maintained. It resembles a provisional bridge by means of which positive philosophy passed over the interval which separates biology proper from sociology. Hardly has it reached the other side when the bridge collapses. It matters little: it suffices that, thanks to the bridge, Comte should have set foot upon the sociological ground. He can now return in all security to the study of the mental functions. “When I had founded sociology,” he says, “I understood at last that Gall’s genius had been unable to construct a real physiology of the brain, owing to the lack of a knowledge of the laws of collective evolution, which alone must furnish at once its principle and its end. From that time I felt that this task, which before I expected biologists to accomplish, belonged to the second part of my own philosophical career.”[193]