Louis Pasteur, Vallery-Radot (ed.), Oeuvres de Pasteur (1922-1939), Vol. I, 331. Quoted in Patrice Debré, Louis Pasteur, trans. Elborg Forster (1994), 261.

Every chemical substance, whether natural or artificial, falls into one of two major categories, according to the spatial characteristic of its form. The distinction is between those substances that have a plane of symmetry and those that do not. The former belong to the mineral, the latter to the living world.

— Louis Pasteur on Chemistry

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "Every chemical substance, whether natural or artificial, falls into one of two major categories, according to the spatial characteristic of its form. The distinction is between those substances that have a plane of symmetry and those that do not. The former belong to the mineral, the latter to the living world." in the context of "Louis Pasteur, Vallery-Radot (ed.), Oeuvres de Pasteur (1922-1939), Vol. I, 331. Quoted in Patrice Debré, Louis Pasteur, trans. Elborg Forster (1994), 261." to mean that wisdom is timeless.

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Source: Wikiquote: "Chemistry" (Quotes: Quotes arranged by century in alphabetical order, 1900s: In this section quotes are arranged in alphabetical order, M - P) The 'What it means' explanation text was generated by Google Gemini Flash (accessed January 18, 2026). https://gemini.google.com/app
Louis Pasteur

About Louis Pasteur

Louis Pasteur (27 December 1822 – 28 September 1895) French microbiologist, chemist, pioneer of the "Germ theory of disease", discoverer of molecular asymmetry and stereo-chemistry, and inventor of the process of Pasteurization.