The investigation of medicines by studying their actions in sick people should be left to masters of observation.
It is difficult to investigate the pure actions of medicines in diseases 164 [i.e. with sick people, §107]. Distinguishing between the symptoms of the simple medicine used for cure and the ailments of the original disease (even in diseases that are mostly invariable, especially the chronic ones) 165 is the object of the art of higher judgement and should be left only to masters of observation.
164 To clarify the meaning of this paragraph, Hahnemann’s synopsis (p. 271) has been included here as the first sentence of the paragraph.
165 It is extremely difficult to distinguish between symptoms of the entire disease (including those from a long time ago) from symptoms never noticed before which are, consequently, new symptoms belonging to the medicine.