Proving Medicines

Organon Aphorism §140

If the person cannot write, the physician must be informed by him every day of what has occurred to him, and how it took place. What is noted down as authentic information on this point, however, must be chiefly the voluntary narration of the person who makes the experiment, nothing conjectural and as little as possible derived from answers to leading questions should be admitted; everything must be ascertained with the same caution as I have counselled above (§§ 84-99) for the investigation of the phenomena and for tracing the picture of natural diseases.

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

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