This lecture is part of the collection "The Kingdom of Childhood" by Rudolf Steiner. Steiner (1861-1925) was an Austrian philosopher, social reformer, architect, and esotericist. He gained initial recognition as a literary critic and cultural philosopher. At the beginning of the 20th century, he founded a spiritual movement, Anthroposophy. He is considered the father of Waldorf education, biodynamic agriculture, anthroposophical medicine and spiritual science. The need for a new art of education. The whole of life must be considered. Process of incarnation as a stupendous task of the spirit. Fundamental changes at seven and fourteen. At seven, the forming of the “new body” out of the “model body” inherited at birth. After birth, the bodily milk as sole nourishment. The teacher’s task to give “soul milk” at the change of teeth and “spiritual milk” at puberty. The entire Collected Works of Rudolf Steiner are available from SteinerBooks.