The sentiment of “self-feeling” is innate, primary. Let us imagine ourselves in a society where the questions of rank, precedence, etiquette, are of capital importance—in an aristocratic monarchy like that of Louis XIV.—and we shall see what a ferment of emotions may be raised by an occurrence which, to our eyes, seems futile and irrelevant. If we read Saint-Simon’s _Mémoires_, we see him boiling over with indignation when a courtier is unduly accorded the privileges of a duke and peer, and his wife is granted a stool in the Queen’s presence. He spends his time in incessant visits, forms coalitions, does all in his power to move the ministers or the Parliament, and finally exults in his victory. However factitious and puerile this agitation may seem, it results from the same physiological mechanism as the simplest emotions: from the instinct of personal preservation—not of his natural _ego_, but of his _ego qua_ courtier of the Grand Monarque. If he fails, he is injured, depreciated, lessened in his conditions of social existence. The case already cited, of Malebranche, to whom Descartes’ _Traité de l’homme_ “caused such violent palpitations of the heart that he was obliged continually to leave his book in order to breathe,” called forth Fontenelle’s remark that “Truth, which is invisible and of no practical utility, is not wont to find so much sensibility among men.” No doubt; but to the true man of science the pursuit of truth is one of the necessary conditions of existence. For others it is a mere luxury, to the loss of which they are quite indifferent. I think we have thus replied to the question previously put—why certain sensations, images, ideas, have the privilege of producing organic and motor changes which, translated into the language of consciousness, constitute the emotional state—and justified our answer. The sensation, the image, the idea, are only occasional causes, incapable by themselves of producing any emotion: it springs from the inmost personality of the individual—from his _organisation_—expresses it directly, and participates in its stability and its instability. IV.