In Steiner's spiritual science, blood is the substance in which the human I lives and works, making it the seat of selfhood contested by good and evil.
The Occult Significance of Blood in Anthroposophy is Rudolf Steiner's teaching that blood is the bodily substance through which the human I, the spiritual ego, lives and works, making it the decisive battleground in the struggle for the human soul. Steiner set this out in the Berlin lecture of 25 October 1906, later printed as Die okkulte Bedeutung des Blutes (GA 55), taking as his title-motif the line Mephistopheles speaks in Goethe's Faust, “Blood is a very special fluid.” Where the physical body expresses inherited form, the ether body the living fluids, and the astral body the nervous system, blood expresses the I. Because the I lives in the blood, whoever gains power over a person's blood gains power over that person. Today the teaching anchors how anthroposophy reads heredity, the mingling of bloodlines, and the passage from ancient clairvoyance to modern self-conscious thinking.
The occult significance of blood is the idea, set out by Rudolf Steiner in 1906, that blood is no mere physical fluid but the carrier of the human I. Drawing his title from Mephistopheles' line in Goethe's Faust, Steiner argued that the ego works directly in the blood, which is why, in saga and legend alike, whoever seizes a person's blood lays claim to that person's very self.
In Steiner's Own Words
What is able to live in a person's blood lives in that person's “I.” Just as the physical principle comes to expression in the physical body, the ether body comes to expression in the system of living fluids, and the astral body in the system of nerves, so does the “I” come to expression in the blood. Physical principle, ether body and astral body are the “above” blood; the “I” forms the center; and physical body, living fluids and nervous system are the “below.” Therefore, whatever power wishes to dominate humans must take possession of their blood.
What it Means Today
The lecture's whole frame is Goethean. Steiner read Faust not as literature but as occult document, and the line he builds the talk around, “Blood is a very special fluid,” is Mephistopheles' demand that Faust sign the pact in blood rather than ink. Steiner's point is that the devil covets blood precisely because it holds the I; possess the blood, and you possess the man. This is Goethe's own method turned on Goethe's own text: read the concrete phenomenon, here the flowing fluid, until its inner law shows itself, the law Steiner names with the Hermetic maxim “As above, so below.” The reading was carried forward at the Goetheanum in Dornach, the School of Spiritual Science Steiner founded in 1923, where the Section for Belles Lettres has continued to treat Faust as a path of knowledge rather than a costume drama. A contemporary practitioner can sit with the same question Steiner posed in Berlin in 1906. When you say “I,” where in your body does that word seem to live? Steiner's answer locates the ego not in the brain that mirrors the world but in the blood that rebuilds it, the warm circulating stream Goethe's Mephistopheles knew enough to bargain for. To read blood this way is to read a single fact until the spirit behind it becomes legible, which is what Goethean science, from 1790 onward, set out to do. The unhealed wound of Amfortas is a mystery of the blood, the seat of the lower nature the Grail must purify.
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