Diseases are nothing more than alterations in the state of health of the healthy individual which express themselves by morbid signs, and the cure is also only possible by a change to the healthy condition of the state of health of the diseased individual, it is very evident that medicines could never cure disease if they did not possess the power of altering man’s state of health which depends on sensations and functions; indeed, that their curative power must be owing solely to this power they possess of altering man’s state of health.

The affection of the morbidly deranged, spirit-like dynamis (vital force) that animates our body in the invisible interior, and the totality of the outwardly cognizable symptoms produced by it in the organism and representing the existing malady, constitute a whole; they are one and the same. The organism is indeed the material instrument of the life, but it is not conceivable without the animation imparted to it by the instinctively perceiving and regulating dynamis, just as the vital force is not conceivable without the organism, consequently the two together constitute a unity, although in thought our mind separates this unity into two distinct conceptions for the sake of easy comprehension.

Organon of medicine: DR. Samuel Hahnemann, 6 th Edition.