When doing everything according to indications, although things may not turn out agreeably to indication, we should not change to another while the original appearances remain.
HippocratesThe body of man has in itself blood, phlegm, yellow bile and black bile; these make up the nature of this body, and through these he feels pain or enjoys health. Now he enjoys the most perfect health when these elements are duly proportioned to one another in respect of compounding, power and bulk, and when they are perfectly mingled.
Hippocrates