The Logic of Perfection and Other Essays in Neoclassical Metaphysics (1962) p. viii.
“Then I gathered the éléments of what people call my symbolism. I do not understand anything about long words and theories. But I am willing to be a symbolist, if that defines the ideas that Michael Angelo gave me, namely that the essence of sculpture is the modelling, the general scheme which alone enables us to render the intensity, the supple variety of movement and character. If we can imagine the thought of God in creating the world, He thought first of the construction, which is the sole principle of nature, of living things and perhaps of the planets. Michael Angelo seems to me rather to derive from Donatello than from the ancients; Raphaël proceeds from them. He understood that an architecture can be built up with the human body, and that, in order to possess volume and harmony, a statue or a group ought to be contained in a cube, a pyramid or some simple figure. Let us look at a Dutch interior and at an interior painted by an artist of the present day. The latter no longer touches us, because it docs not possess the qualities of depth and volume, the science of distances. The artist who paints it does not know how to reproduce a cube. An interior by Van der Meer is a cubic painting. The atmosphere is in it and the exact volume of the objects; the place of these objects has been respected, the modem painter places them, arranges them as models. The Dutchmen did not touch them, but set themselves to render the distances that separated them, that is, the depth. And then, if I go so far as to say that cubic truth, not appearance, is the mistress of things, if I add that the sight of the plains and woods and country views gives me the principle of the plans that I employ on my statues, that I feel cubic truth everywhere, and that plan and volume appear to me as laws of all life and ail beauty, will it be said that I am a symbolist, that I generalise, that I am a metaphysician? It seems to me that I have remained a sculptor and a realist. Unity oppresses and haunts me.”
Source: Auguste Rodin: The Man, His Ideas, His Works, 1905, p. 65-67
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Auguste Rodin 73
French sculptor 1840–1917Related quotes

Beuys' quote from Theory of Social Sculpture, 1979, as cited in: Chris Thompson. Felt: Fluxus, Joseph Beuys, and the Dalai Lama. 2011. p. 88-89
1970's

Speech https://api.parliament.uk/historic-hansard/commons/1889/jul/25/the-royal-grants#S3V0338P0_18890725_HOC_142 in the House of Commons (25 July 1889)
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Source: Auguste Rodin: The Man, His Ideas, His Works, 1905, p. 65

1920s, Review of The Meaning of Meaning (1926)

On Mind and Thought (1993), p. 34
Posthumous publications
Context: It is astonishingly beautiful and interesting, how thought is absent when you have an insight. Thought cannot have an insight. It is only when the mind is not operating mechanically in the structure of thought that you have an insight. Having had an insight, thought draws a conclusion from that insight. And then thought acts and thought is mechanical. So I have to find out whether having an insight into myself, which means into the world, and not drawing a conclusion from it is possible. If I draw a conclusion, I act on an idea, on an image, on a symbol, which is the structure of thought, and so I am constantly preventing myself from having insight, from understanding things as they are.

Source: Life Itself : A Memoir (2011), Ch. 54 : How I Believe In God