Consider our physical body; we look on it as having been formed out of the spiritual world in the primordial past as a dwelling for the human soul. Only a materialistic mind could believe that this human body had not been born originally from the spirit. Seen merely from an external point of view, the physical body must appear a miracle of perfection.
What do all our intellectual ability and technical skill amount to, compared with the wisdom manifest in the structure of the human heart? Or take the engineering technique that goes into the building of bridges, and so forth — what is it compared with the construction of the human thigh-bone, with its wonderful crisscross of support members, as seen through the microscope. It would be sheer boundless arrogance for man to suppose that he has attained in the slightest degree to the wisdom inherent in the formation of the external physical body.
And consider our soul-life, taking into account only our instincts, desires and passions — how do they function? Are we not doing all we can to undermine inwardly the wisdom-filled organisation of our body? Indeed, if we consider without prejudice the marvel of our physical organisation, we have to admit that our bodily structure is far wiser than anything we can show in our inner life, although we may hope that our inner life will advance from its present imperfection towards increasing perfection. We can hardly come to any other conclusion, even without clairvoyance, if we simply look impartially at the observable facts.
Source: Rudolf Steiner – GA 59 – Metamorphoses of the Soul – Vol. 2: Lecture 8: Human Conscience – Berlin, 5th May 1910