If you pursue good with labor, the labor passes away but the good remains; if you pursue evil with pleasure, the pleasure passes away and the evil remains.
To reduce man to the duties of his own city, and to disengage him from duties to the members of other cities, is to break the universal society of the human race.
That which leads us to the performance of duty by offering pleasure as its reward, is not virtue, but a deceptive copy and imitation of virtue.
[Lat., Nam quae voluptate, quasi mercede aliqua, ad officium impellitur, ea non est virtus sed fallax imitatio simulatioque virtutis.]