- De Officiis or On Duties, was considered one of the three texts required for a proper education for many centuries. (The others were Plato’s Works & Aristotle’s Ethics.) On Duties was the second book ever printed. The first was the Gutenberg Bible.
- the purpose of education was to train people to be of service to others, to the common good, non nobis solum nati sumus – “we are not born just for ourselves” translating into Latin a sentence from Plato’s Ninth Letter, De Officiis (1.22). responsibility to others, reflects Stoic cosmopolitanism, that we don’t belong just to our own little polis, but are citizens of the world.