Those who, seeing the success of Gall’s doctrine, imagine that the doctrine therefore rests upon some solid foundation, know very little of mankind. Gall knew mankind better. He studied them in his own way, but he studied them very closely. Let us hear his own words: “In society, I employ many expedients to find out the talents and inclinations of people. I start the conversation upon a variety of topics. In general, we let fall in conversation whatsoever has little or no concern with our faculties and penchants; but when the interlocutor touches upon one of our favourite subjects, we at once become interested in it.... Do you wish to spy out the character of a person, without the fear of being misled as to your conclusions, even though he might be on his guard? Set him to talking about his childhood and boyhood; make him relate his schoolboy exploits; his conduct towards his parents, his brothers and sisters, and his playfellows, and his emulators.... Ask him about his games, &c. Few persons think it necessary to dissemble upon these points; they do not suspect they are dealing with one who knows perfectly well that the basis of character remains ever the same; and that the objects only that interest us change with the progress of years.... Besides, when I discover what it is that a person admires or despises; when I see him act; when he is an author, and I merely read his book, &c. &c. the whole man stands unveiled before me.”[119] Descartes _shut himself up in a stove_,[120] in order that he might meditate. According to Gall, there is no necessity for one’s shutting himself up in a stove. Descartes says: “Now I shall shut my eyes, I shall stop my ears, I shall turn my senses aside; I shall even efface from my memory every image of corporeal objects, or at least, as that can hardly be done, I will repute them as vain and false; and thus, shut up within myself, and contemplating what is within me, I shall endeavour gradually to become more and more familiarly acquainted with my own real nature.”[121] According to Gall, there is no occasion for this absolute gathering one’s self together within. All that is needful is to look at and touch the skulls of people. Gall’s doctrine succeeded just as Lavater’s did. Men will always be looking out for external signs by which to discover secret thoughts and concealed inclinations: it is vain to confound their curiosity upon this point: after Lavater came Gall; after Gall some one else will appear. We soon become wearied of a true philosophy, because it is true; because the search after truth, of whatsoever kind, requires strenuous and continual efforts. It is impossible, moreover, always to have the very same philosophy: even the same philosopher cannot be always approved of. Approbation must change its object, especially in France.