Pleasures, pains, and pleasurable or painful emotions, all include motor elements. So much is evident, yet let us remark what follows: if we divide the affective states—roughly, yet sufficiently for our purpose—into two groups, on one side pains and painful emotions, on the other pleasures and pleasurable emotions, a difficulty presents itself. The first group, that of the “asthenic” states, manifests itself by a diminution of movements, circulation, respiration, etc. The second group, that of the “sthenic” states, manifests itself by the reverse phenomena, increased movement, circulation, etc. Shall we say that the second group, which contains more motor elements, is revived more easily and more frequently than the first? The conclusion would be logical, but contrary to experience. We should even find, I believe, that the contrary opinion has more supporters.[105] ----- Footnote 105: This opinion will be discussed later on. ----- Organic sensations appear to depend principally on the chemical action taking place in the organism; it is thus with hunger, thirst, suffocation, disgust, fatigue, etc. Here the part played by the motor element is but trifling. As this revival is vague, this group seems to conform to the law stated above. To sum up: when examined in detail our formula is only a partial explanation, a generalisation of limited application. IV. We have now arrived at the principal question, for which all that has hitherto been said was only a preparation: Is there such a thing as a real revival of impressions? Although most psychologists do not put this question at all, or only treat it in a cursory manner, the majority of answers are certainly in the negative. It is maintained that we remember the conditions and circumstances of an emotional occurrence, but not the emotional state itself. I feel obliged completely to reject this theory, which would never have been maintained if the subject had not been treated _a priori_, in an offhand manner, without sufficient observations. A closer study, supported by the facts which I have adduced, and others which will follow, shows that there are two quite distinct cases. Some people have a _false_ or _abstract_ memory for feelings, others a _true_ or _concrete_ one. In the former the image is scarcely revived, or not at all; in others it is revived in great part, or totally. In order the better to explain the difference between these two forms of memory, let us examine the constituent elements and the mechanism of each separately.