Organon §191

This is confirmed unambiguously by experience which shows in all cases of a so-called local malady (even those on the most external parts of the body) that every efficacious internal medicine, immediately after its ingestion, causes significant alterations in the rest of the patient's condition, especially in the external suffering parts (which appear to the ordinary medicinal art to be isolated). To be sure, if one selects an internal medicine, directed at the whole, which is fittingly homeopathic, it will cause the most salutary alteration, the recovery of the whole human being, along with the disappearance of the external malady, without the assistance of an external means.