The spell lay in the extreme simplification, the reduction of the elements to a powerful unity, according to a scheme with which Rodin had made experiments in silence and which he now revealed. And at this point I am led to a brief explanation of Rodin's ideas upon the technical part of his art.

At the time of the Balzac's appearance I gave an account of the way by which Rodin had been led to a new conception of sculpture. This was in an article[3] that has been reproduced more or less everywhere, and that Rodin has been good enough to consider as the emanation and direct expression of his artistic wishes. I cannot enter into all the details. The scale of this book would not allow of that, but the following are the principal points of that evolution.

Rodin's is above all a temperament inclined to the expression of passionate and tragic character. Thence comes his constant study of movement. As I said before, that study has led him to give unlooked-for values to the general outline and to produce works which may be viewed on all sides and which continually show a fresh and balanced aspect that explains the other aspects: otherwise the daring gestures and the bold combinations of the limbs would have given an air of absurdity to the groups. Rodin is at the same time very reflective and very instinctive. He matures a thought slowly, but he often passes by chance from that thought to its realisation. This is the predominant feature of his nature, and it explains his entire art. Rodin often appears unconscious, astonished at what he had in him and at what he has brought into existence, to such a degree that he explains it badly enough. He sees his thought in the whole of nature and finds it there again; that thought, indeed, is fed by general ideas, and is, if I may say so, almost "elemental." From this point of view Rodin's genius is independent of his talent as a sculptor. It sometimes happens to him to see a block of marble or a knob of wood, and the form of such an object will show him what he will make and the movement of the figure. He adapts to it one of the ideas which he always has in reserve: the aspect of the wood or the marble determines the passage of the thought to the material which will incarnate it. I said one day to Rodin: "One would say that you knew there was a figure in that block, and that you do nothing beyond breaking away the stone that hides it from us." He answered that that was exactly his feeling as he worked. Upon the naked figure Rodin has ideas that are peculiar to his nature as a mystic and a realist. He considers the body with its four limbs as a cypher, of which the combinations are infinite. That is an old idea that was held by primitive theologians of the Eastern religions. And it is the fact that Rodin has invented an immense series of attitudes and combinations that one would not have thought possible: he attaches little groups to the side of a block of marble with the freedom of a painter throwing a figure upon a background. He makes his people light, he makes them soar, he entwines them in surprising positions.

It was therefore absolutely essential that he should find means to constitute a logical harmony on every side of his works. Scholastic statuary is opposed to this principle. Its tendency is to treat groups as bas-reliefs. The spectator must stand in front, at a certain spot, and whatever is behind is accessory: the decorative line produces its effect only from that point. So true is this that statues are very often so placed in public squares that people cannot pass round them. The academic sculptors treat a piece of sculpture like a picture; it has a right side and a wrong side. Rodin, shocked at this method, began by working in quite a different way. He made successive sketches of all the faces of his works, going constantly round them so as to obtain a series of views connected in a ring. Travels in Italy had led him to think that the ancients proceeded in this manner and that their great endeavour was to get the design of the outline by means of movement, which continually modifies the anatomy. Anatomy, indispensable to the artist, becomes the source of all the academic errors if once we forget that it is but inertia, the state of non-action, and consequently incapable of expressly teaching us about life and about the modifications that thought imposes upon flesh. The real value of a living figure is given by profiles studied successively in a full light. Rodin was delighted by this way of working. But his pictorial inclinations, his ideas about the possible formation of a background in sculpture as in painting, were not satisfied.

When the academic school wishes to make use of a background to a figure it confines itself to a hollow or a relief. Rodin desired that a statue should stand free and should bear looking at from any point, but he desired nevertheless that it should remain in relation with light and with the surrounding atmosphere. He was struck by the hard, cut-out aspect of ordinary statues, and asked himself how an atmosphere might be given to them. Painting has two means to this end: of which the first is values. Values are independent of colour. Values, an element common to both arts, are in painting and sculpture the relations as to opacity or transparence of an object and the background against which it is seen. They may be dark on a light ground, light on a dark ground, or light upon a ground that is likewise light; but they are always the very life of the outline, and the important point is to fix that outline first of all. When we see a person placed between the sun and ourselves, against the light, we do not at first perceive the details within the outline, but we do see the general mass of the body, and that mass is filled with more or less intense colour, in which we presently distinguish details. Our perception at the moment is as much sculptural as pictorial. Rodin, struck by the importance of this idea, devoted himself to obtaining, at once and together, the volume; that is to say, the equivalent in sculpture of the value, and the design of successive views of one movement.

But the second means in painting is the employment of intermediate tones encircling the figure and combining with the background. How could an equivalent be found for that? Logic led Rodin on to a step which alarmed him: he made experiments after examining the antiques very closely. He took fragments of his statues and began to raise them in certain places by layers of clay, intensifying the modelling and enlarging the lines. He observed that the light now played better upon these enlarged lines; the refraction of light upon these amplified surfaces was softer, the hardness of the cut-out outline vanished, and a radiant zone shaped itself around his figures and united them gradually with the atmosphere. In this way, therefore, by means of this systematic accentuation of the outlines, an intermediate tone, a radiancy of the forms, was produced.

Rodin understood at once that he had found his way to the deepest secret of his art; that is to say, to the ideal limit where through its hidden laws a plastic art touches the other arts in a negation of all that is merely materialistic. The intermediate tones in painting, the radiating surfaces in sculpture, are the same principle as the nervous radiations noted in photographing a hand, where it may be seen that the fingers are prolonged by emanations. Nothing is fixed, limited, or finished in nature, and the radiating state is the only real one. But this was a dangerous discovery for a sculptor, since people would immediately exclaim upon the deformation of what was seen, the alteration of the fact, the falsification of anatomy. Therefore Rodin proceeded in silence and with very great prudence. The point was not, of course, to enlarge all surfaces equally, for that would have produced only an increase of scale. The thing was to amplify, with tact, certain parts of the modelling, the edges of which were swept by the light, so as to give a halo to the outline. At the same time, Rodin experimented in a series of drawings made on purpose, forbidding himself to give any detail, tracing only the outlines of bodies filled in with one wash of water-colour that gave the value. I shall return to these sketches. They cannot be understood without a knowledge of their original purpose.

This theory, to which Rodin approved of my giving the name of deliberate amplification of surfaces, is simply the critical principle of Greek sculpture, which has been entirely misunderstood by the academic school. That school, which is supposed to honour the Greeks, is really false to their spirit and their teaching. Moreover, this principle, which belongs to all the primitive statuary that was made for the open air, is to be found among the Egyptians and the Assyrians. It calls in question the academic tradition whereby exactitude is confounded with truth. In reality it may be said to be a profoundly classic principle which has been denied by the academic school. Here, as in painting, classicism is opposed to the academic. Hence it should be concluded that in reality Rodin is by no means an innovator opposing himself to a school that retains classic traditions, but, speaking precisely, a classic, returning to nature, replacing himself in the state of mind of a Greek before his model, and opposing himself to a school that has overloaded art with methods, formulas, and expedients that change the character of antique and Gothic art. Rodin has a horror of what is called "originality," and an even greater horror of what is called "inspiration." He only trusts completely to work and to minute, sincere observation of nature. "Slowness is a beauty," he often says. He has the greatest antipathy for "sculpture with literary meanings," and has often been galled, without saying so, by certain praises, in which writers, reeling off pages of description about his works, have thought to please him by dwelling on the idea and not on the execution. "I invent nothing," he says; "I rediscover. And the thing seems new because people have generally lost sight of the aim and the means of art; they take that for an innovation which is nothing but a return to the laws of the great sculpture of long ago. Obviously, I think; I like certain symbols, I see things in a synthetic way, but it is nature that gives me all that. I do not imitate the Greeks; I try to put myself in the spiritual state of the men who have left us the antique statues. The 'École' copies their works; the thing that signifies is to recover their method. I began by showing close studies from nature like The Age of Brass. Afterwards I came to understand that art required a little more largeness, a little exaggeration, and my whole aim, from the time of the Burghers, was to find a method of exaggerating logically: that method consists in the deliberate amplification of the modelling. It consists also in the constant reduction of the figure to a geometrical figure, and in the determination to sacrifice any part of a figure to the synthesis of its aspect. See what the Gothic sculptors did. Look at the cathedral of Chartres; one of the towers is massive and without ornament: they sacrificed it to give value to the exquisite delicacy of the other tower.

"In sculpture the projection of the muscular fasciculi must be accentuated, the foreshortening forced, the hollows deepened; sculpture is the art of the hole and the lump, not of clear, well-smoothed, unmodelled figures. Ignorant people, when they see close-knitted true surfaces, say that 'it is not finished.' No notion is falser than that of finish unless it be that of elegance; by means of these two ideas people would kill our art. The way to obtain solidity and life is by work carried out to the fullest, not in the direction of achievement and of copying details, but in that of truth in the successive schemes. The public, perverted by academic prejudices, confounds art with neatness. The simplicity of the 'École' is a painted cardboard ideal. A cast from life is a copy, the exactest possible copy, and yet it has neither motion nor eloquence. Art intervenes to exaggerate certain surfaces, and also to fine down others. In sculpture everything depends upon the way in which the modelling is carried out with a constant thought of the main line of the scheme, upon the rendering of the hollows, of the projections and of their connections; thus it is that one may get fine lights, and especially fine shadows that are not opaque. Everything should be emphasised according to the accent that it is desired to render, and the degree of amplification is personal, according to the tact and the temperament of each sculptor; and for this reason there is no transmissible process, no studio recipe, but only a true law. I see it in the antique and in Michael Angelo. To work by the profiles, in depth not by surfaces, always thinking of the few geometrical forms from which all nature proceeds, and to make these eternal forms perceptible in the individual case of the object studied, that is my criterion. That is not idealism, it is a part of the handicraft. My ideas have nothing to do with it but for that method; my Danaids and my Dante figures would be weak, bad things. From the large design that I get your mind deduces ideas."