The volitions that are driven back on every occasion and excluded, to make way for the volitional act, are variously denominated in ordinary speech and by psychologists as _appetites, tendencies, impulses, affections, wishes, velleities, desires, aspirations, passions._ But, as is usual with us, we do not intend to compose and defend such classes in a naturalistic and psychological sense, nor consequently to distinguish appetite from desire, or affection from passion, with boundaries that must of necessity be arbitrary and undulating. What is of real importance is only the distinction and the precise boundary, not arbitrary but real, between the volition and volitions, or, as we can now say, the relation between true and proper _volition_ and _the passions or desires._ [Sidenote: _Passions and desires as possible volitions._] Passions or desires are and are not volitions: they are not volitions in respect to the volitional synthesis, which, by excluding, annuls them as such; they are on the other hand volitions, if considered in themselves, for they are capable of constituting the centre of new syntheses in changed conditions. It has been said that we cannot _will the impossible,_ but that we can perfectly well _desire it._ That is not exact, because the impossible, the contradictory, cannot even be the object of desire. No one wishes to find himself at the same moment in two different places, or to construct a triangle that should be at the same time a square: and even if such absurd wishes be manifested in words, the words will be absurd, but the desires will either be different from what is stated, or they will not exist even as desires. In a certain aspect all desires are desires of the impossible (and not only some of them), if, that is to say, we consider them as volitions that have not been realized and which cannot be realized at that moment: but from another point of view, they are all possible, and can indeed be precisely defined as _possible volitions._ This is proved by their becoming gradually actual as the actual situation changes. If (to choose a very simple illustration) an individual engaged in a certain work repel the desire for food and sleep with his volition and action, that desire is nothing at that point, as actual volition; but it does not for that reason lose its intrinsic volitional character, for when the hour for the repast or for sleep has struck, it passes from possibility to actuality and becomes the will for food and sleep. The sophism previously criticized, by means of which a bad and unsuccessful act, that is to say one that is dominated by passion and caprice, is justified by proving that it has had a legitimate motive and answers to a good intention, appeals to this character of possibility, possessed by all desires, and artfully changes it into a character of actuality, thus substituting for the given the imagined situation. [Sidenote: _Volition as conflict with the passions._]