1058. In the human body and its viscera, especially in the cerebrum and cerebellum, also in both medullary substances, likewise in the liver and kidneys, spiritual things are represented by the bodies that are striated, as it were, medullary; these especially are white. The grosser spiritual things are also represented by the more visible ducts so conjoined and situated as still to relate to a striated body; thus they are represented by all the ducts in which any liquid is secreted, except the sanguineous ducts. Such striated bodies therefore are also white, and if they are most delicately striated they are transparent.