"Thus, while I thought myself employed only in forming a Nomenclature, and while I proposed to myself nothing more than to improve the chemical language, my work transformed itself by degrees, without my being able to prevent it, into a treatise upon the Elements of Chemistry."

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Synthetic or inorganic substances do not contain any 'life force'; they are not dynamic. Everything is made of chemicals, but organic substances like essential oils have a structure which only mother nature can put together. They have a life force, an additional impulse which can only be found in living things.

— Robert Tisserand