To reach the higher sentiments, in fact, two conditions are needed: (1) one must be capable of conceiving and understanding general ideas; (2) these ideas must not remain simple intellectual forms, but must be able to arouse certain feelings, certain approximate tendencies. If one or other condition is wanting, the emotion is not produced. The formula of the evolution during this period is very simple; the order of development of the emotions depends strictly on the order of development of general ideas; it is the evolution of ideas which rules that of feelings. Here we are in perfect agreement with the intellectualist theory. The faculty of abstraction and generalisation is very unequally apportioned. It depends on the race, the age, the individual. Some never pass the level of generic images which are only concrete images simplified and condensed. Some reach those medium forms of abstraction in which the word plays the part of substitute for the reality, but requires, in order to be understood, that the qualities of the thing which it represents should be figured by a vague scheme, the concomitant of the word. Some reach the stage of complete substitution, in which the word takes the place of the whole, and has need of no auxiliary to insure the mental operation. Each of these degrees (which include sub-divisions I do not indicate) has its possible echo in feeling. Thus every one, according to the range of his intelligence, may reach some or all these stages, and according to his temperament experience or not experience at each of them an emotional state. The emotions which are susceptible of a complete evolution will furnish the proofs. A very simple example may be found in the sexual impulse, which may in turn be physiological, psycho-physiological, chiefly psychological, and finally intellectual. At its lowest stage (in the micro-organisms and similar beings) we find facts of a purely vital and organic order, in my opinion unconscious; then consciousness appears, but the sexual emotion manifests itself in a purely specific shape without individual choice; it is simply an instinct, “the genius of the race making use of the individual to reach its own ends.” Later on individuality becomes marked; we find choice; the tender emotions, not found in the early stage, are superadded. Then comes the moment of equilibrium between the organic elements and the psychic elements, as usually found in the normal average man. This state is very complex, resulting from the fusion or convergence of numerous tendencies, hence its power of attraction. Then comes a rupture of equilibrium, a period of interversion; the physiological element is slowly effaced, the psychic element gains in intensity; it is a repetition of the primitive period, but in the opposite direction. This is the intellectual phase of love; the idea appears first, the physiological phenomena come afterwards. At a more elevated stage