Anthroposophical Spiritual Science and Medical Therapy (Lectures Section)

Through spiritual science, Rudolf Steiner was able to extend the scientific knowledge of his day — in which he was well grounded — into new realms. In these advanced lectures, Dr. Steiner gives new insights into the processes of health and illness in the human organism, elaborating on the substances and processes which treat illness.
Link: http://wn.rudolfsteinerelib.org/Lectures/GA313/English/MP1991/AnMeTh_index.html

Greek and Germanic Mythology in the Light of Esotericism (Lectures Section)

These four lectures, Cosmic History, Greek and German Mythology, are from the German edition that bears the title, Kosmische Geschichte. Esoterik in der Griechischen und Germanischen Mythologie, (Volume 90f in the Bibliographic Survey, 1961).
Link: http://wn.rudolfsteinerelib.org/Lectures/GGMyth/GerMyt_index.html

The Younger Generation (Lectures Section)

When Rudolf Steiner gave these lectures to about a hundred German youth hoping to carry the new Waldorf education into modern culture, he stressed the need for “self-education” as the preliminary to all other education. Reading what lived in the youth movement of the time, he attempted to guide his young listeners toward an understanding of themselves within the present world situation of dawning spiritual knowledge. In these lectures Steiner shows the spiritual reality behind the generation gap in which the older and younger generations speak “entirely different soul languages.” Youth longs to find spirit in nature, warm community life, and living wisdom in teachers and so must reject modern adults’ dead intellectualism, impersonal social routine, and rampant egotism. While opposition may at first generate enthusiasm, only the will for creation can provide working strength in the long run. These stimulating lectures can help renew this will for creation in people of all ages.
Link: http://wn.rudolfsteinerelib.org/Lectures/YounGener/YunGen_index.html