We study health, and we deliberate upon our meats and drink and air and exercises, and we hew and we polish every stone that goes to that building; and so our health is a long and regular work. But in a minute a cannon batters all, overthrows all, demolishes all; a sickness unprevented for all our diligence, unsuspected for all our curiosity, nay, undeserved, if we consider only disorder, summons us, seizes us, possesses us, destroys us in an instant.