I have long been silently asking myself, my friend Serenus, to what I should liken such a condition of mind, and I find that nothing more closely resembles it than the conduct of those who, after having recovered from a long and serious illness, occasionally experience slight touches and twinges, and, although they have passed through the final stages of the disease, yet have suspicions that it has not left them, and though in perfect health yet hold out their pulse to be felt by the physician, and whenever they feel warm suspect that the fever is returning. Such men, Serenus, are not unhealthy, but they are not accustomed to being healthy; just as even a quiet sea or lake nevertheless displays a certain amount of ripple when its waters are subsiding after a storm. What you need, therefore, is, not any of those harsher remedies to which allusion has been made, not that you should in some cases check yourself, in others be angry with yourself, in others sternly reproach yourself, but that you should adopt that which comes last in the list, have confidence in yourself, and believe that you are proceeding on the right path, without being led aside by the numerous divergent tracks of wanderers which cross it in every direction, some of them circling about the right path itself.