Organon §154
The most fitting medicine for a disease is the one that has in its symptom set, the greatest number of characteristic symptoms with the greatest similarity to the disease symptoms.
If the counter-image that is put together from the set of symptoms of the most apt medicine contains the characteristic signs (i.e. , those that are special, uncommon, odd, and distinguishing) of the disease to be cured, in the greatest number and in the greatest similarity, then this medicine is the most fitting, homeopathic, specific remedy for this disease state. If the disease is of not-too-long duration, it will be lifted and extinguished without significant ailment, usually by the first dose.