...virtue is not merely a state in conformity with the right principle, but one that implies the right principle; and the right principle in moral conduct is prudence.

Fear is pain arising from the anticipation of evil.

For even they who compose treatises of medicine or natural philosophy in verse are denominated Poets: yet Homer and Empedocles have nothing in common except their metre; the former, therefore, justly merits the name of the Poet; while the other should rather be called a Physiologist than a Poet.

No one chooses what does not rest with himself, but only what he thinks can be attained by his own act.

Those who cannot bravely face danger are the slaves of their attackers.

Metaphor is halfway between the unintelligible and the commonplace.

We should behave to our friends as we would wish our friends behave to us