We are never so virtuous as when we are ill. Has a sick man ever been tempted by greed or lust? He is neither a slave to his passions nor ambitious for office; he cares nothing for wealth and is content with the little he has, knowing that he must leave it. It is then that he remembers the gods and realizes that he is mortal: he feels neither envy, admiration, nor contempt for any man: not even slanderous talk can win his attention or give him food for thought, and his dreams are all of baths and cool springs. These are his sole concern, the object of all his prayers; meanwhile he resolves that if he is lucky enough to recover he will lead a sober and easy life in future, that is, a life of happy innocence.

So here for our guidance is the rule, put shortly, which the philosophers seek to express in endless words and volumes: in health we should continue to be the men we vowed to become when sickness prompted our words.

— Pliny the Younger, letter to Valerius Marcinius