Advice About Keeping Well (10)

ZEUXIPPUS. I am not unaware that men contract fevers because of fatigue and extremes of heat and cold; but just as the scents of flowers are weak by themselves, whereas, when they are mixed with oil, they acquire strength and intensity, so a great mass of food to start with provides substance and body, as it were, for the causes and sources of disease that come from the outside. Without such material none of these things would cause any trouble, but they would readily fade away and be dissipated, if clear blood and an unpolluted spirit are at hand to meet the disturbance; but in a mass of superfluous food a sort of turbulent sediment, as it were, is stirred up, which makes everything foul and hard to manage and hard to get rid of. Therefore we must not act like those much admired (!) ship-masters who for greed take on a big cargo, and thenceforth are continually engaged in baling out the sea-water. So we must not stuff and overload our body, and afterwards employ purgatives and injections, but rather keep it all the time trim, so that, if ever it suffer depression, it shall, owing to its buoyancy, bob up again like a cork.