The human body contains blood, phlegm, yellow bile and black bile. These are the things that make up its constitution and cause its pain and health. Health is primarily that state in which these constituent substances are in the correct proportion to each other, both in strength and quantity, and are well mixed.

Healing in a matter of time, but it is sometimes also a matter of opportunity.

...all the most acute, most powerful, and most deadly diseases, and those which are most difficult to be understood by the inexperienced, fall upon the brain.

I also maintain that clear knowledge of natural science must be acquired, in the first instance, through mastery of medicine alone.

Let food be thy medicine and medicine be thy food

The human soul develops up to the time of death.

All diseases begin in the gut.