The Dead, Materialism, and Spiritual Concepts
This is how the metamorphosis takes place. Our head, as it were, falls away in one incarnation, having been the outcome of our body in our previous incarnation. And our body transforms itself, metamorphoses itself—as does leaf to petal in Goethe's theory of metamorphosis—into our head in our next incarnation. Now because our head is formed from the earthly body of our previous incarnation, the spiritual world has a great amount of work to do on this head between death and our new birth, for its archetypal form must be fashioned by the spiritual world in accordance with karma. That is why, even in the embryo, the head appears before anything else in its complete form, for more than any other part it has been influenced by the cosmos. The body, on the other hand, is influenced for the most part by the human organism. So this appears later than the head in the embryo. Apart from its physical substance, which has of course been gathered through heredity, our head, in its form, its archetypal form, is indeed shaped by the cosmos, by the sphere of the cosmos. It is not for nothing that your head is more or less spherical in shape, for it is an image of the sphere of the universe; the whole sphere of the universe works to form your head. Thus we can say that our head is formed from the sphere.
Cite:
GA 173c/1917-01-21/p014 · edition English