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.

Life is short and the art long.

Prayer indeed is good, but while calling on the gods a man should himself lend a hand.

About medications that are drunk or applied to wounds it is worth learning from everyone; for people do not discover these by reasoning but by chance, and experts not more than laymen.

The function of protecting and developing health must rank even above that of restoring it when it is impaired.

When in sickness, look to the spine first.

Health is the greatest of human blessings.