CHAPTER VII[ToC]
THE DIALECTIC
Quantity and Quality.
(Here Herr Duehring contends "The first and most important statement with respect to the foundation logical properties of existence points to the exclusion of contradiction. Contradiction is a category which can belong to thought alone but which can pertain to nothing real. There are no contradictions in things; in other words the law of contradiction is itself the crowning point of absurdity." To which Engels replies as follows):
The thought content of the foregoing passages is contained in the statement that contradiction is an absurdity and cannot occur in the actual world. This statement will have for people of average common sense the same self-evident truth as to say that straight cannot be crooked nor crooked straight. But the differential calculus shows in spite of all the protests of common sense that under certain conditions straight and crooked are identical, and reaches thereby a conclusion which is not in harmony with the common sense view of the absurdity of there being any identity between straight and crooked. Considering moreover the significant role which the so called Dialectic of the Contradiction played in the ancient Greek philosophy, a stronger opponent than Herr Duehring would be obliged to meet it with better arguments than a mere affirmation and a number of epithets.
As long as we regard things as static and without life, each by itself, separately, we do not run against any contradictions in them. We find certain qualities sometimes common, sometimes distinctive, occasionally contradictory, but in this last case they belong to different objects and are hence not self contradictory. While we follow this method we pursue the ordinary metaphysical method of thought. But it is quite different when we consider things in their movement, in their change, their life and their mutually reciprocal relations. Then we come at once upon contradictions. Motion is itself a contradiction since simple mechanical movement from place to place can only accomplish itself by a body being at one and the same moment in one place and simultaneously in another place by being in one and the same place and yet not there. And motion is just the continuous establishing and dissolving the contradiction.
Here we have a contradiction which is "objective, and so to speak corporeal in things and events." And what does Herr Duehring say about it? He affirms that "in rational mechanics there is no bridge between the strictly static and the dynamic." Finally the reader is able to see that there is behind this pretty little phrase of Herr Duehring nothing more than this—that the metaphysical mode of thought can absolutely not pass from the idea of rest to that of motion because the aforesaid contradiction intervenes. Motion is absolutely inconceivable to the metaphysician, because a contradiction. And as he affirms the inconceivability of motion he admits the existence of this contradiction against his will and therefore admits that it constitutes an objective contradiction in actual facts and events, and is moreover an actual fact.
But if simple mechanical motion contains a contradiction in itself still more so do the higher forms of motion of matter and to a high degree organic life and its development. We saw above that life consists chiefly in this that a being is at one and the same time itself and something different. Life itself then is likewise a contradiction contained in things and events, always establishing and dissolving itself, and as soon as the contradiction ceases life also ceases, death comes on the scene. Thus we saw also that we cannot put an end to the Contradictions in the realm of thought, and how for example the contradiction between the intrinsically unlimited possibilities of human knowledge and its actual existence in the persons of human beings with limited faculties and powers of knowledge, is dissolved in the, for us at least, practically endless progression of the race, in unending progress.
We stated just now that higher mathematics holds as one of its basic principles that straight and crooked may be identical under certain circumstances. It shows another contradiction, that lines which apparently intersect yet are parallel from five to six centimeters from the point of intersection, should be such as should never intersect although indefinitely produced, and yet, notwithstanding these and even greater contradictions, it produces not only correct results but results which are unattainable by lower mathematics.