This instrument of our life of concepts and ideas is inherited externally through our line of heredity. Its delicate convolutions are formed in one way or another according to this line of heredity. The soul will always to some extent have the inner strength to overcome what does not suit it and bring its instrument into harmony with its own forces, but only to a certain extent. The stronger the soul is the better it can do this. And if circumstances are such that it becomes impossible for the soul forces to overcome the resistance in the composition of the brain, the brain cannot be used properly. And then there occurs what we call mental defectiveness, mental illness. A melancholic temperament arises too, because the soul forces are not strong enough to overcome certain things in the organism. In the middle of life — it is different at the beginning and at the end — the forces of our soul always encounter a certain unsuitability in their instrument. This is the secret that always lies hidden behind the inner conflict and disharmony in human nature. What men often imagine to be the reason for their discontent is usually just a mask. In reality the reasons for it are as we have described. Thus we see the relationship between what the soul takes with it from incarnation to incarnation and what it receives from the line of heredity.
Source: Rudolf Steiner – GA 107 – THE BEING OF MAN AND HIS FUTURE EVOLUTION – VI. Illness and Karma – Berlin, 26th January 1909
Translated by Pauline Wehrle
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