Proving Medicines

Organon Aphorism §142

But how some symptoms of the simple medicine employed for a curative purpose can be distinguished amongst the symptoms of the original malady, even in diseases, especially in those of a chronic character that usually remain unaltered, is a subject appertaining to the higher art of judgement, and must be left exclusively to masters in observation.

Samuel Hahnemann, Organon of Medicine, 6th edition (Boericke translation, public domain).

Expert explanation & clinical interpretation for this aphorism are coming soon.