The Spiritual Development of Man
GA 84
Three lectures given by Rudolf Steiner at Dornach, 20th, 21st, and 22nd of April, 1923. They are lectures four, five, and six of eleven lectures in the series entitled, A Challenge for the Goetheanum and for Anthroposophy. Published in German as, Was Wollte das Goetheanum und Was Soll Die Anthroposophie?
| I. | The Inner Experience of the Activity of Thinking | April 20, 1923 |
| II. | The Physical World and the Moral-Spiritual Impulses | April 21, 1923 |
| III. | Man's Faculty of Cognition in the Etheric World | April 22, 1923 |