Stobaeus on Stoic Ethics 15

Again, the Stoics say that every base man is mad, being ignorant of himself and his own concerns; and that is madness. 

And ignorance is the vice opposite to prudence; and a certain relative disposition of this, which makes one’s impulses unstable and fluttery, is madness. That is why they give an outline of madness as follows: a fluttery ignorance.  

Again, of good things, some are attributes of all prudent men all the time, and some are not. 

Every virtue and prudent sense-perception and prudent impulse and the like are attributes of all prudent men on every occasion; but joy and good spirits and prudent walking are not attributes of all prudent men and not all the time. 

Analogously, of bad things too, some are attributes of all imprudent men all the time, and some are not. 

Every vice and imprudent sense-perception and imprudent impulse and the like are attributes of all imprudent men all the time; but pain and fear and imprudent answering are not attributes of all imprudent men and not on every occasion.