To comprehend a thing means in the language of practical intelligence to be able to trace the series of means intervening between a phenomenon and some other existence on which it depends,—to discover what is called the ordinary course of nature, in compliance with the laws and relations of the intellect, e.g. causality, reasons, &c. The purely sensitive life, on the contrary, even when it retains that mere nominal consciousness, as in the morbid state alluded to, is just this form of immediacy, without any distinctions between subjective and objective, between intelligent personality and objective world, and without the aforementioned finite ties between them. Hence to understand this intimate conjunction, which, though all-embracing, is without any definite points of attachment, is impossible, so long as we assume independent personalities, independent one of another and of the objective world which is their content—so long as we assume the absolute spatial and material externality of one part of being to another. (β) Self-feeling (Sense of Self)(124). § 407. (αα) The sensitive totality is, in its capacity of individual, essentially the tendency to distinguish itself in itself, and to wake up to the _judgment in itself_, in virtue of which it has _particular_ feelings and stands as a _subject_ in respect of these aspects of itself. The subject as such gives these feelings a place as _its own_ in itself. In these private and personal sensations it is immersed, and at the same time, because of the “ideality” of the particulars, it combines itself in them with itself as a subjective unit. In this way it is _self-feeling_, and is so at the same time only in the _particular feeling_. § 408. (ββ) In consequence of the immediacy, which still marks the self-feeling, i.e. in consequence of the element of corporeality which is still undetached from the mental life, and as the feeling too is itself particular and bound up with a special corporeal form, it follows that although the subject has been brought to acquire intelligent consciousness, it is still susceptible of disease, so far as to remain fast in a _special_ phase of its self-feeling, unable to refine it to “ideality” and get the better of it. The fully-furnished self of intelligent consciousness is a conscious subject, which is consistent in itself according to an order and behaviour which follows from its individual position and its connexion with the external world, which is no less a world of law. But when it is engrossed with a single phase of feeling, it fails to assign that phase its proper place and due subordination in the individual system of the world which a conscious subject is. In this way the subject finds itself in contradiction between the totality systematised in its consciousness, and the single phase or fixed idea which is not reduced to its proper place and rank. This is Insanity or mental Derangement.