Inhoud: The life and work of George Adams; Rudolf Steiner's conquest of agnosticism; Physics and the light of the world; Human experiences of today and the "Second Coming"; Goethe's concept of light and darkness and the science of the future; Plant growth and the forms of space; The threefold structure of the world; Art and science in the 20th century; The hidden forces in mechanics; Potentization and the peripheral forces of natures; Questions and answers