PART 24
XXIV. As I have said before, we must examine the powers of humours, and what the effect of each is upon man, and how they are related to one another. Let me give an example. If a humour that is sweet assumes another form, not by admixture, but by a self-caused change, what will it first become, bitter, or salt, or astringent, or acid? I think acid. Therefore where sweet humour is the least suitable of all, acid humour is the next least suitable to be administered.1 If a man can in this way conduct with success inquiries outside the human body, he will always be able to select the very best treatment. And the best is always that which is farthest removed from the unsuitable.