But do the theoretical and the practical activity exhaust the whole of the spirit of man? There is at least one more psychological category which clamours for admission within the precincts of philosophy, that of feeling or sentiment. For Croce, feeling as a form of spiritual activity does not exist: the corresponding psychological class covers a number of heterogeneous facts, which cannot be reduced to a single concept. Its function in philosophy has always been that of serving as a temporary term for that which philosophy had not yet hilly determined and understood; in æsthetics, for the intuitive character of art, against the fallacies of hedonism and intellectualism; in the theory of history for the individual and concrete element of history, or even for the subjective historical judgment, against positivism and sociologism; in logic, for the pure concept against the empirical and abstract. Its function in the philosophy of the practical is of the same order: feeling or sentiment are among the names by which the peculiarity of the practical activity first began to be recognized, being labels for classes of psychological facts in which the moment of will is more important than that of reason, practice more essential than theory. But the psychological facts thus classified resolve themselves ultimately either into acts of knowledge or of will; and the witness of direct consciousness does not find feeling or sentiment within itself as a distinct form of spiritual activity. Obviously, this exclusion does not imply that Croce denies the existence of the empirical groups of facts gathered in those classes; it means only that he has reduced those facts to the immediate data of consciousness of which they consist, and divested them of that mysterious halo, the halo of ignorance or of deliberate error, with which an appeal to sentimental reasons is sure to be accompanied when introduced into a philosophical discussion. When we hear, for instance, that philosophy and science belong to the sphere of reason, and religion to that of sentiment, since there is no sentiment which is not either reason or will, we at once understand that what is meant is that the speaker is willing to believe, for practical motives, what his reason tells him to be untrue; and we know also that this error contains, sometimes at least, an element of truth, which is the affirmation of a truer reason than the one employed by a certain type of philosophy, by a rationalism which treats the human spirit as a thing of abstract logic. The error consists in the putting of one's will in the place of one's reason; the germinal truth, in the attempt to make one's reason wider, more comprehensive. It is, therefore, one of those positions in which it is a sin against the spirit to acquiesce, but which are the beginning of wisdom in the man of good faith.