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Essence of Materia Medica – page 150

PHOSPHORICUM ACIDUM (ph-ac.)
Phosphoric acid is characteristed by great weakness or enfee-blement which begins on the emotional plane and progresses sub-sequently to the physical and mental planes. Prolonged grief or sudden, severe grief are the usual exciting causes. My clinical experience does not bear out Kent’s description of mental enfee-blement being the primary pathological state in Phosphoric acid. In patients I have seen, the enfeeblement seems to affect pri¬marily the emotional level, with subsequent progression to either the physical of mental level depending on the hereditary strength or weakness of the constitution.
Innner or outer stimuli can create weakness in every individual at some point—whether on the physical, emotional, or mental levels. The precise level of vulnerability is a matter of individu¬ality. The specific Phosphoric acid weakness begins on the emo¬tional level. By contrast, two other acids primarily affect the other levels; Picric acid leads all remedies by susceptibility to mental enfeeblement, while Muriatic acid is primarily characterised by muscular enfeeblement.
In Phosphoric acid, there is usually a history of grief. This may be grief of a minor nature over a prolonged period of time, or it may be a sudden major grief. In Phosphoric acid, it is not necessary for the grief to be of great intensity; Ignatia, by contrast, requires a greater shock than Phosphoric acid to experience pathology. Characteristically, the phosphoric acid patient suffers the grief in silence—it should be listed in italics in the Repertory under Silent Grief, alongside Ignatia, Natrum mur., and Pulsatilla. The patient’s initial response is a kind of softening, or a drop¬ping down in tone on the emotional plane. This then leads to emotional indifference. The patient becomes isolated, wants to be left alone, much like Sepia. The isolationism is even typified by the Phosphoric acid tendency to sleep facing the wall in bed.
As the patient is affected deeper by the grief, the emotional level becomes completely "frozen down"; there is no emotional move-ment whatsoever. Such a profound stillness occurs on the emo-