These lectures trace the activities of warmth, light, and rhythm in the life forms of the natural world. The intent is to form a picture of "the etheric" which is both an important and difficult concept. Moving from an historical look at the idea of the ethers into some of the contributing streams in Rudolf Steiner's thinking such as the fourth dimension, the nature of warmth and the infinitely distant, and then finally to the current scientific research that supports the idea of the etheric realm.
Topics include: the polarities of chaos and rhythm in the ancient world; inner surfaces of water; minimal surfaces in biology and in potentization; vortex movements in air and water; properties of air and warmth; the presence of infinity in plant growth; and the micro-crystalline geometries of mineral interfaces in nature.
