"In the case of the musician Bach we have proof that heredity counts for nothing if the Ego is not advanced, for his genius was not borne down his family line; it gradually faded out, finally leaving the family stream entirely. So, too, the coming of idiots or vicious children to parents who are good, pure, or highly intellectual is explained in the same way. They are cases where heredity is set at nought by a wholly bad or deficient Ego."