Life is short, science is long; opportunity is elusive, experiment is dangerous, judgement is difficult.

Time is that wherein there is opportunity, and opportunity is that wherein there is no great time.

Your foods shall be your 'remedies,' and your 'remedies' shall be your foods.

Where there is love of medicine, there is love of humankind.

Eunuchs do not take the gout, nor become bald.

The patient must combat the disease along with the physician.

Men ought to know that from the brain and from the brain only arise our pleasures, joys, laughter, and jests as well as our sorrows, pains, griefs and tears. ... It is the same thing which makes us mad or delirious, inspires us with dread and fear, whether by night or by day, brings us sleeplessness, inopportune mistakes, aimless anxieties, absent-mindedness and acts that are contrary to habit.