Aphorism 129 | Organon of Medicine By Dr. Samuel Hahnemann
If the effects that result from such a dose are but slight, a few more globules may be taken daily, until they become more distinct and stronger and the alterations of the health more conspicuous; for all persons are not effected by a medicine in an equally great degree; on the contrary, there is a vast variety in this respect, so that sometimes an apparently weak individual may by scarcely at all affected by moderate doses of a medicine known to be of a powerful character, while he is strongly enough acted on by others of a much weaker kind. And, on the other hand, there are very robust persons who experience very considerable morbid symptoms from an apparently mild medicine, and only slighter symptoms from stronger drugs. Now, as this cannot be known beforehand, it is advisable to commence in every instance with a small dose of the drug and, where suitable and requisite, to increase the dose more and more from day to day.
-Dr. Samuel Hahnemann