Organon §34

To cure, a medicine must not only be stronger than the disease to be cured, it must be able to produce an artificial disease as similar as possible to the natural one. 

The greater strength of the artificial disease that a medicine can produce is, however, not the only requirement for its being able to cure a natural disease. Above all, a medicine must be capable of producing an artificial disease as similar as possible to the disease to be cured. With its somewhat stronger energy, it will thus be able to displace the instinctual life principle (which is not capable of any deliberation or recollection) into a disease-tunement very similar to the natural one. It does this not only to obscure the feeling of the natural disease mistunement in the life principle but to entirely extinguish and so to annihilate that feeling. This is so true that no older disease can be cured, even by nature itself, through a new, supervening dissimilar disease, be it ever so strong. Just as little can it be cured by medicinal treatments (such as the allopathic ones) which are incapable of engendering a similar disease state in the healthy body.