Theses de dolore

XIX.
Others recognize only a solution of unity. To this opinion, Galen also seems to subscribe in some places, following the mind of Hippocrates, who said that every disease is an ulcer.

XX.
We, having put Averroes aside, judge that former opinion to be most true when speaking as physicians; however, we do not entirely contradict those defending this latter view, provided they confess they speak as philosophers and not as physicians.

XXI.
For philosophers, relying solely on contemplation, investigate a double unity in the body: one of homophuias nature or temperament, and another of homounchias the cohesion of solid parts.

XXII.
Hence a double solution of unity also follows: one indeed manifest to the sense, which alone the physician, who is a sensate artisan, admits; the other indeed unmanifest, which we say can happen to the body formally considered per se, although it also sometimes changes into the manifest per accidens.

XXIII.
The efficient cause of the former are all those things that prick, dissect, pull apart, crush, or erode, etc., whether they are external or internal.

XXIV.
These are either solid bodies, or humorous, or spirituous.

XXV.
Solid bodies are those having sufficient hardness to dissect, crush, etc., a part, whether they consist of metals, stones, woods, bones, etc.

XXVI.
These either harm from the outside and the affection is detected by sight, or from within, whether assumed from outside or slipped in, for example, needles, thorns, coins; or whether born in the body, such as stones or worms.