Naturalism (error of): The error of naturalism is not that it is blind to aesthetic qualities, certainly, but, in the first place, that it lacks sufficient reason insofar as it takes itself for an end in itself, or what amounts to the same thing, insofar as it attributes glory to the artist or to the sensible model alone; and second that it violates the rules resulting from tradition, on the one hand, and from the nature of things, on the other. [GTUFS: LogicT, The Saint and the Divine Image]

Art, as soon as it is no longer determined, illuminated, and guided by spirituality, lies at the mercy of the individual and purely psychic resources of the artist, and these resources must soon run out, if only because of the very platitude of the naturalistic principle that calls only for a superficial copying of Nature. Reaching the extreme limit of its own platitude, naturalism inevitably engendered the monstrosities of surrealism. The latter is but the decomposing body of an art and, in any case, should rather be called “infrarealism”; it is, properly speaking, the satanic consequence of naturalistic luciferianism. Naturalism, as a matter of fact, is clearly luciferian in its wish to imitate the creations of God, not to mention its affirmation of the psychic element to the detriment of the universal, and above all, of the bare fact to the detriment of the symbol. [GTUFS: UnityReligions, Concerning Forms in Art]

Naturalism (in art): Naturalism in art violates tradition because it is unaware that style is a providential discipline proceeding from a genius at once spiritual and ethnic and developing according to the laws of organic growth in an atmosphere of contemplative piety which is not in the least individualistic or Promethean. It violates the nature of things because, in painting, it treats the plane surface as if it were three-dimensional space, and the immobility of the surface as if it could contain movement; and in sculpture, naturalism treats inert matter as if it were living flesh, and then as if it were engaged in motion, and it sometimes treats one material as if it were another, without regard for the soul of each substance, and so on. [GTUFS: LogicT, The Saint and the Divine Image]