manifestations, and another man who expresses it aesthetically; between the aspect, the cries, and the contortions of one who is tortured with sorrow at the loss of a dear one, and the words or song with which the same individual portrays his torture at another moment; between the distortion of emotion and the gesture of the actor. Darwin's book on the expression of the feelings in man and animals does not belong to Aesthetic; because there is nothing in common between the science of spiritual expression and a _Semiotic_, whether it be medical, meteorological, political, physiognomic, or chiromantic. Expression in the naturalistic sense simply lacks expression in the spiritual sense, that is to say, the characteristic itself of activity and of spirituality, and therefore the bipartition into poles of beauty and of ugliness. It is nothing more than a relation between cause and effect, fixed by the abstract intellect. The complete process of aesthetic production can be symbolized in four steps, which are: _a_, impressions; _b_, expression or spiritual aesthetic synthesis; _c_, hedonistic accompaniment, or pleasure of the beautiful (aesthetic pleasure); _d_, translation of the aesthetic fact into physical phenomena (sounds, tones, movements, combinations of lines and colours, etc.). Anyone can see that the capital point, the only one that is properly speaking aesthetic and truly real, is in that _b_, which is lacking to the mere manifestation or naturalistic construction, metaphorically also called expression. The expressive process is exhausted when those four steps have been taken. It begins again with new impressions, a new aesthetic synthesis, and relative accompaniments. [Sidenote] _Intuitions and memory._ Expressions or representations follow and expel one another. Certainly, this passing away, this disassociation, is not perishing, it is not total elimination: nothing of what is born dies with that complete death which would be identical with never having been born. Though all things pass away, yet none can die. The representations which we have forgotten, also persist in some way in our spirit, for without them we could not explain acquired habits and capacities. Thus, the strength of life lies in this apparent forgetting: one forgets what has been absorbed and what life has superseded. But many other things, many other representations, are still efficacious elements in the actual processes of our spirit; and it is incumbent on us not to forget them, or to be capable of recalling them when necessity demands them. The will is always vigilant in this work of preservation, for it aims at preserving (so to say) the greater and more fundamental part of all our riches. Certainly its vigilance is not always sufficient. Memory, we know, leaves or betrays us in various ways. For this very reason, the vigilant will excogitates expedients, which help memory in its weakness, and are its _aids_.