Feeling, therefore, cannot but lose importance in the Hegelian philosophy, which makes of art a form of knowledge, and of the teleological judgment the logic of the idea or philosophical logic, resolving also in it the demand of Jacobi, whose feeling or immediate knowledge is shown to be logical knowledge and supreme mediation. In Hegel feeling is nothing but a class of spiritual facts, the lowest of all, that in which theory and practice are still indistinct. But this class has a merely psychological value in his system, not philosophical and real (which is not clearly recognised by him). Indeed, feeling, which was absolute knowledge for Jacobi and for Schleiermacher, is placed, not in the sphere of the absolute spirit, nor in that of the objective or practical spirit, but in the subjective spirit, or Psychology. The "doctrine of the three faculties" (_Dreivermögenslehre_), as was called that elaborated from Mendelssohn to Kant and promulgated in the Kantian philosophy, did not, however, remain without opponents in the nineteenth century; from Krug (1823) to the youthful Fichte, and in more recent times Brentano (1874). [Sidenote: _Opponents of the doctrine of the three faculties. Krug._] Krugs confutation is wrongly combated by Hamilton and discredited by Brentano, for it proceeds with perfect correctness, and is founded on the correct philosophical principle that' there are no other activities of the spirit conceivable, save those directed either inwardly or outwardly (immanent or theoretical and transcendent or practical), and that therefore there is no place for feeling, which would be a mixture of the two activities, and consequently a failure of direction or inactivity, nothing, therefore, but a poor, rudimentary knowing or willing, that is, a psychological class, not a philosophical category. [Sidenote: _Brentano._] Brentano, returning in a measure to Descartes, constructs the doctrine of the three faculties in a different way, determining them as representation (to which he makes art and the æsthetic activity correspond), judgment (to which corresponds science), and love and hate (to which corresponds the practical). Feeling, therefore, does not find a place of its own in the psyche, and that which is wont to be called feeling is either representation, or love and hate. Brentano shows himself inferior to Krug in the philosophical demonstration of the inconceivability of this form of the spirit, but he has the merit of having substituted certain positive elements for the indeterminate word "feeling," although the function exercised by feeling in the development of philosophical thought is more important than Brentano succeeds in perceiving, for among other things he ignores and fails to recognize the relation of the concept of feeling to the demands of speculative thought.[31] [1] _Eutyphron,_ 10.