The shaking up of false beliefs prior to their destruction is what Christian Scientists call chemicalization. "By chemicalization I mean the process which mortal mind and body undergo in the change of belief from a material to a spiritual basis," Science and Health, pp. 168-169; Mrs. Eddy explains. Some stirring of thought happens virtually every time there is a spiritual healing, but this does not need to be evidenced in suffering or in catastrophic events. Spiritual healing may occur without our even being immediately aware of it. The fear and suffering seemingly caused by chemicalization are only in proportion to one's belief in the reality of mortality.
Isn't there an analogy here with those disturbing events we call earthquakes?
Geologically considered, earthquakes release pent-up stress and are a natural part of the development of the earth's crust. Why should we expect them to be harmful? Might we not conclude that earthquakes appear destructive to human life because most of humanity is firmly convinced of the existence of a carnal, mortal mind—as being, indeed, the only mind? People believe this mind is subordinate to a material body and the material body to the whims of nature.