At the left side of the brain, or in its left hemisphere, are located those falsities that relate to the feelings; at the right side those that relate to indoctrination. Or, at the left side is all that looks toward goodness, and at the right, all that looks to what is true. In souls, therefore, hardenings of the callus or skulls show up accordingly. These incrustations are something that must soften. This takes place in various ways, by such means as enlightened knowledge-by being educated in what is true-as well as by bitter surges of truth, bringing on pain; after this has occurred, by an actual process of dismemberment, which is painful. It is the more painful according to the nature of the falsities and the consequent hardenings. So the process is repeated, and still there remain hardenings; for a hardening softens by stages and degrees, both as a whole, and part by part. Hardenings also cling to the inner marrows.