In Hegel's early philosophy of nature (draft manuscripts written during his time at the University of Jena), Hegel's notion of "Geist" was tightly bound to the notion of "Aether", from which Hegel also derived the concepts of space and time, but in his later works (after Jena) he did not explicitly use his old notion of "Aether" anymore.
Na primeira filosofía da natureza de Hegel (borradores de manuscritos escritos durante a súa etapa na Universidade de Jena), a noción de Geist estaba estreitamente ligada á noción de «éter», da cal Hegel tamén derivou os conceptos de espazo e tempo; porén, nos seus traballos posteriores (despois de Jena) non empregou explicitamente a vella noción de «éter».