This plan was finally given up, but a series of rather abstruse letters to Körner, beginning in January, 1793, may be regarded as preparatory studies for the contemplated treatise. Schiller's idea was, evidently, to blaze a private trail through the jungle of Kantian theory, with Körner's critical assistance, and then to return and convert the trail into an agreeable road for the general reader. In the end he chose a different form than that of the Socratic dialogue for the literary presentation of his doctrine, but what he wrote subsequently was based partly at least upon conclusions that he had reached through his correspondence with Körner; wherefore it will be well to look a little more closely, at this point, into his quarrel with the Königsberg philosophy. As is well known, Kant placed the aesthetic faculty under the jurisdiction of the 'judgment', which he regarded as a sort of connecting link between the pure reason and the practical reason, that is, between cognition and volition. A judgment is teleologic, according to his scheme, if it implies a pre-existing notion to which the object is expected to conform; it is aesthetic when pleasure or pain is produced directly by the object itself. In the good and the agreeable we have an interest,--we will the former and desire the latter. The beautiful, on the other hand, is that which pleases without appealing to any interest (_interesseloses Wohlgefalien_). This is its character under the category of quality. Under that of quantity it is a universal pleasure; under that of relation, a form of adaptation (_Zweckmäszigkeit_), with no end present to the mind. Finally, under the fourth category--modality--it is 'necessary', being determined not by any objective criterion, but by the _sensus communis_ of mankind, that is, their agreement in taste.