First of all a natural talent is required; for when Nature opposes, everything else is in vain; but when Nature leads the way to what is most excellent, instruction in the art takes place.

Life is short, art long, opportunity fleeting, experiment uncertain, and judgment difficult.

Everything in excess is opposed to nature.

If we could give every individual the right amount of nourishment and exercise, not too little and not too much, we would have found the safest way to health.

Divine is the task to relieve pain

For extreme illnesses extreme treatments are most fitting.

Opposites are cures for opposites.