1023. CONCERNING CALLUSES THAT THE THINGS OF THE LEFT EYE CORRESPOND TO THOSE OF THE RIGHT PART OF THE CEREBRUM At the left part of the cerebrum, or in its left hemisphere, those things are presented which are false as to the affections, and at the right those which are false as to doctrinals; or, at the left, those that look to good, but at the right those that look to truth. In souls, therefore, the hardenings of the callus, or of the skulls, so present themselves. These hardenings are such that they need to be softened, which is effected in various ways, as by means of cognitions, by information as to truths, also by such hard influxes of verities that they bring pain. When this is done it is later effected by actual rendings which are painful, being the more painful according to the nature of those things that are false and thus are hardened. These things are repeated, but the hardenings still remain; for a hardening is softened by alternations, and by degrees, in things simultaneous and in things successive. Like things inhere also in the interior medulla.