Letter 67 — On Ill-health and Endurance of Suffering (§14)

“In this connexion I think of our friend Demetrius, who calls an easy existence, untroubled by the attacks of Fortune, a “Dead Sea.” If you have nothing to stir you up and rouse you to action, nothing which will test your resolution by its threats and hostilities; if you recline in unshaken comfort, it is not tranquillity; it is merely a flat calm.”