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

Old people have fewer diseases than the young, but their diseases never leave them.

The chief virtue that language can have is clearness, and nothing detracts from it so much as the use of unfamiliar words.

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.

Anyone wishing to study medicine must master the art of massage.

War is the only proper school of the surgeon.

Sport is a preserver of health.