VII. Are There Limits to Knowing?

Monism is never put in the position of asking for other principles of explanation for reality besides perception and concept. It knows that within the entire domain of reality there is no cause to do so. It sees in the world of perception, as this is directly present to perception, something half real; in uniting the world of perception with the conceptual world it finds the full reality. The metaphysical realist may object to the adherent of monism: It might be the case that for your organization your knowledge is complete in itself, that no part is mission; but you do not know how the world is mirrored in an intelligence organized differently from yours. Monism's answer would be: If there are intelligences other than human ones, and if their perceptions have another form than ours do, then only that has significance for me which reaches me from them through perception and concept. Through my perception, and indeed through my specifically human perception, I am placed as subject over against the object. The connection of things is thereby broken. The subject re-establishes this connection through thinking. It has thereby united itself again with the world whole. Since it is only by our subject that this whole seems to be split at a place between our perception and our concept, so it is that in the reuniting of these two true knowledge is also given. For beings with a different world of perception (for example, with twice our number of sense organs) the connection would appear to be broken at a different place, and its re-establishment would accordingly also have to take a form specific to those beings. Only for naive and metaphysical realism, which both see in the content of the soul only an ideal representation of the world, does the question of a limit to knowledge arise. For them, what is outside the subject is something absolute, something self-contained, and the content of the subject is a picture of it and stands totally outside this absolute. The completeness of one's knowledge depends upon the greater or lesser similarity of one's picture to the absolute object. A being whose number of senses is smaller than man's will perceive less of the world; a being with a larger number, more of it. The former accordingly will have a less complete knowledge than the latter.