The essence of his logic is the dialectic.

By dialectic the old Greeks understood the art of discourse and rejoinder, the refutation of an opponent by the destruction of his assertions and proofs, the bringing into relief of the contradictions and antitheses. When examined closely, this art of discussion, in spite of its contradictory and apparently negative (destructive) intellectual work, is seen to be very useful, because, out of the clash of opposing opinions, it brings forth the truth and stimulates to deeper thought. Hegel seized hold of this expression, and named his logical method after it. This is the dialectical method, or the manner of conceiving the things and beings of the universe as in the process of becoming, through the struggle of contradictory elements and their resolution. With its aid, he brings to judgment the three original laws of thought which have already been alluded to. The principle of identity is an abstract, incomplete truth, for it separates a thing from the variety of other things, and its relations to them. Everybody will see this to be true. Let us take the proposition: the earth is the earth. Whoever hears the first three words of this proposition naturally expects that what is predicated of the earth should tell him something which distinguishes the earth from other things. Instead of this, he is offered an empty, hard and fast identity, the dead husk of an idea. If the principle of identity is at best only an incomplete truth, the principles of contradiction and of the excluded middle are complete untruths. Far from making a thought nonsense, contradiction is the very thing which unfolds and develops the thought, and hence, too, the object which it expresses. It is precisely opposition, or antithesis, which sets things in motion, which is the mainspring of evolution, which calls forth and develops the latent forces and powers of being. Had the earth as a fiery, gaseous mass remained in that state, without the contradiction, that is, the cooling and condensation, taking place, then no life would have appeared on it. Had the State remained autocratic, and the contradictory principle, middle-class freedom, been absent, then the life of the State would have become rigid, and the bloom of culture rendered impossible. Had Capitalism remained without its proletarian contradiction, then it would have reverted to an industrial feudalism. It is the contradiction, or the antithesis, which brings into being the whole kingdom of the potentialities and gifts of nature and of humanity. Only when the contradictory begins to reveal itself does evolution to a higher plane of thought and existence begin. It is obvious that we are not concerned here with logical contradictions, which usually arise from unclear thinking or from confusion in the presentation of facts; Hegel, and after him Marx, dealt rather with real contradictions, with antitheses and conflicts, as they arise of themselves in the process of evolution of things and conditions.

The thing or the being, against which the contradiction operates, was called by Hegel the Positive, and the contradiction, the antagonistic element, or the antithesis, he called the Negation. As may be seen from our example, this negation is not mere annihilation, not a resolution into nothing, but a clearing away and a building up at the same time; a disappearance and a coming into existence; a movement to a higher stage. Hegel says in this connection: "It has been hitherto one of the rooted prejudices of logic and a commonly accepted belief that the contradiction is not so essential or so inherent a characteristic (in thought and existence) as the identity. Yet in comparison with it the identity is, in truth, but the characteristic of what is simply and directly perceived, of lifeless existence. The contradiction, however, is the source of all movement and life; only in so far as it contains a contradiction can anything have movement, power, and effect."

The part played by the contradiction, the antithesis, or the negation very easily escapes a superficial observer. He sees, indeed, that the world is filled with a variety of things, and that where anything is there is also its opposite; e.g., existence—non-existence, cold—heat, light—darkness, mildness—harshness, pleasure—pain, joy—sorrow, riches—poverty, Capital—Labour, life—death, virtue—vice, Idealism—Materialism, Romanticism—Classicism, etc., but superficial thought does not realise that it is faced with a world of contradictions and antitheses; it only knows that the world is full of varied and manifold things. "Only active reason," says Hegel, "reduced the mere multiplicity and diversity of phenomena to antithesis. And only when pushed to this point do the manifold phenomena become active and mutually stimulating, producing the state of negation, which is the very heart-beat of progress and life." Only through their differentiation and unfolding as opposing forces and factors is further progress beyond the antithesis to a higher positive stage made possible. "Where, however," continues Hegel, "the power to develop the contradiction and bring it to a head is lacking, the thing or the being is shattered on the contradiction."—(Hegel, "Science of Logic," Pt. 1, Sec. 2, pp. 66, 69, 70.)

This thought of Hegel's is of extraordinary importance for the understanding of Marxism. It is the soul of the Marxian doctrine of the class-struggle, nay, of the whole Marxian system. One may say that Marx is always on the look-out for contradictions within the social development, for wherever the contradiction (antithesis—class struggle) shows itself, there begins, according to Marx-Hegel, the progress to a higher plane.[1]

We have now become familiar with two expressions of the dialectical method, the positive and the negation. We have seen the first two stages of the process of growth in thought and in reality. The process is not yet complete. It still requires a third stage. This third step Hegel called the Negation of the Negation. With the continued operation of the negation, a new thing or being comes into existence.

To revert to our examples: the complete cooling and condensation of the earth's crust: the rise of the middle-class State: the victory of the Proletariat: these things represent the suspension or the setting aside of the Negation; the contradiction is thus resolved, and a new stage in the process of evolution is reached. The expressions Positive (or affirmation), Negation, and Negation of the Negation, are also known as thesis, antithesis, and synthesis.

In order to understand this more distinctly, and to visualise it, let us consider an egg. It is something positive, but it contains a germ, which, awakening to life, gradually consumes (i.e., negatives) the contents of the egg. This negation is, however, no mere destruction and annihilation; on the contrary, it results in the germ developing into a living thing. The negation being complete, the chick breaks through the egg shell. This represents the negation of the negation, whereby there has arisen something organically higher than an egg.

This mode of procedure in human thinking and in the operations of nature and history Hegel called the dialectical method, or the dialectical process. It is evident that the dialectic is at the same time a method of investigation and a philosophy. Hegel outlines his dialectic in the following words:

"The only thing which is required for scientific progress, an elementary principle for the understanding of which one should really strive, is the recognition of the logical principle that the negative is just as much a positive, or that the contradictory does not resolve into nothing, into an abstract nothingness, but actually only into the negation of a special content.... In so far as the resultant, the negation, is a definite negation, it has a content. It is a new conception, but a higher and richer conception than the preceding one; for it has been enriched by the negation or antithesis of this; it therefore contains it and more than contains it, being indeed the synthetic unity of itself and its contrary. In this way the system of concepts has to be formed—and is to be perfected by a continual and purely intellectual process which is independent of outside influences."—(Hegel, "Science of Logic" (German), Bk. I., Introduction.)