"Fortify yourself with contentment, for this is an impregnable fortress."

"The reason why we have two ears and only one mouth is that we may listen the more and talk the less."

"If you want to be a philosopher, prepare to be mocked."

"You have been given the principles that you ought to endorse, and you have endorsed them. What kind of teacher, then, are you still waiting for in order to refer your self-improvement to him? You are …"

"Those proficient praise no one, blame no one, and accuse no one. They say nothing concerning their self as being anybody or knowing anything."