120     In investigations of this nature we must not allow ourselves to be deceived by the assertions of the patients of their friends, who frequently assign as the cause of chronic, even of the severest and most inveterate diseases, either a cold caught (a thorough wetting, drinking cold water after being heated) many years ago, or a former fright, a sprain, a vexation (sometimes even a bewitchment), etc. These causes are much too insignificant to develop a chronic disease in a healthy body, to keep it up for years, and to aggravate it year by year, as is the case with all chronic diseases from developed psora. Causes of a much more important character than these remembered noxious influences must lie at the root of the initiation and progress of a serious, obstinate disease of long standing; the assigned causes could only rouse into activity the latent chronic miasm.