Deductive confirmation of the two forms and deductive exclusion of the third feeling.
Finally, with the establishment of the duality-unity of the theoretical and the practical, we have demonstrated that which at the beginning of the exposition had only been asserted and presupposed: namely, why a practical form of the spirit must be placed beside the theoretical,[5] and why there is no third form beyond these, whether it be called feeling or by any other name.[6] The theoretical form postulates the practical, because the subject postulates the object; but the spirit does not postulate a third form intermediate between the two, or unity of the two, because it is itself precisely mediator and unity of itself, subject-object.
[1] Section I.
[2] Section II.
[3] Section I. c. 3.
[4] Section I. c. 4.
[5] Section I. c. 1.
[6] Section I. c. 2.