Organon §25

Medicines, in appropriate doses, cure those diseases whose symptoms most nearly resemble their own.

In all careful experiments, pure experience (the only and infallible oracle of the medical art) teaches us the following: A medicine which, in its impingement on healthy human bodies, has proven that it is able to engender the greatest number of symptoms similar to those found in the case of disease to be cured, does also (in properly potentized and diminished doses) rapidly, thoroughly and permanently lift the totality of symptoms of this disease state (see §6-§16). It lifts the entire disease that is present, transforming it into health. All medicines, without exception, cure those diseases whose symptoms most nearly resemble their own, and leave none of them uncured.

I do not mean that kind of experience of which ordinary practitioners of the old school boast, after having rummaged about for years with a heap of compounded prescriptions used against a host of diseases that they never precisely examine but recognize only according to the categories of orthodox pathology. These practitioners imagine that they can detect in diseases some fancied disease matter or they impute to them some other hypothetical internal abnormality. They always see something but they are never aware of what it is. They obtain results that no human being, but only a god, could decipher from the multiple of forces impinging on an unknown object. These are results from which nothing can be learned, no experience gained. Fifty years' experience of this kind is like fifty years of looking into a perpetually turning kaleidoscope crammed with unknown colored objects that are constantly rotating-thousands of figures transforming themselves forevermore and no accounting for them!