Carbono e silício em Steiner (2007)

To a certain extent, the carbon in man and animal masks its native power of configuration. It finds a pillar of support in the configurative forces of limestone and silicon. Limestone gives it the earthly, silicon the cosmic formative power. Carbon, therefore, in man himself — and in the animal — does not declare itself exclusively competent, but seeks support in the formative activities of limestone and silicon. (Steiner 2007:27)

STEINER, Rudolf. 2007. The Agriculture Course. (Trans.: George Adams) Shrewsbury: Wilding & Son Ltd.