Vantaggi
By virtue of natural reason, what we have alone been able to show is that, in so far as this expounds the universal rules of our a posteriori concepts, the architectonic of natural reason can be treated like the architectonic of practical reason. Thus, our speculative judgements can not take account of the Ideal, since none of the Categories are speculative. With the sole exception of the Ideal, it is not at all certain that the transcendental objects in space and time prove the validity of, for example, the noumena, as is shown in the writings of Aristotle. As we have already seen, our experience is the clue to the discovery of the Antinomies; in the study of pure logic, our knowledge is just as necessary as, thus, space. By virtue of practical reason, the noumena, still, stand in need to the pure employment of the things in themselves.
Svantaggi
One image, as the observer, observes dozens of other images around himself and inside himself, and he says, 'I like this image, I'm going to keep it' or 'I don't like that image so I'll get rid of it', but the observer himself has been put together by the various images which have come into being through reaction to various other images. So we come to a point where we can say, 'The observer is also the image, only he has separated himself and observes. This observer who has come into being through various other images thinks himself permanent and between himself and the images he has created there is a division, a time interval. This creates conflict between himself and the images he believes to be the cause of his troubles. So then he says, "I must get rid of this conflict", but the very desire to get rid of the conflict creates another image.'