"The letters written by the Stoic philosopher and tragedian Seneca to his friend Lucilius are in effect moral essays, whose purpose is to reinforce Lucilius' struggle to achieve wisdom and serenity, uninfluenced by worldly emotions. Seneca advises his friend on how to do without what is superfluous, whether on the subject of happiness, riches, reputation, or the emotions. The letters include literary critical discussions, moral exhortation, exemplary...