Earthly Knowledge and Heavenly Wisdom. A collection of 9 lectures given by Rudolf Steiner from February 2 to February 18, 1923 (CW 221)
For your convenience, below is a zip file of this entire set of lectures. It does require that you have an unzipping utility of some kind on your computer. For you mac people this is built in.
The Entire Book Earthly Knowledge and Heavenly Wisdom
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1. Self-Knowledge and Experiencing the Christ in Oneself (February 2, 1923)
2. The Human Being in Waking and in Sleeping, Part 1 (February 3, 1923)
3. The Human Being in Waking and in Sleeping, Part 11 (February 4, 1923)
4. Earthly Learning and Heavenly Wisdom: Human Beings as Citizens of the Universe and Hermits on the Earth, Part 1 (February 9, 1923)
5. Earthly Learning and Heavenly Wisdom: Human Beings as Citizens of the Universe and Hermits on the Earth, Part 11 (February 10, 1923)
6. The Invisible Human Being Within Us (February 11, 1923)
7. Moral Impulses and their Physical Manifestations: Taking Up a Spiritual Path, Part 1 (February 16, 1923)
8. Moral Impulses and their Physical Manifestations: Taking Up a Spiritual Path, Part 11 (February 17, 1923)
9. Moral Impulses and their Physical Manifestations: Taking Up a Spiritual Path, Part 111 (February 18, 1923)