In other living creatures the ignorance of themselves is nature, but in men it is a vice.
As far as possible, join faith to reason.
Good men seek it by the natural means of the virtues; evil men, however, try to achieve the same goal by a variety of concupiscences, and that is surely an unnatural way of seeking the good. Don't you agree?
He who is virtuous is wise; and he who is wise is good; and he who is good is happy.
Nothing is miserable unless you think it so.
Nothing is miserable unless you think it so; and on the other hand, nothing brings happiness unless you are content with it.