The shape of the heaven is of necessity spherical; for that is the shape most appropriate to its substance and also by nature primary.

Music has a power of forming the character, and should therefore be introduced into the education of the young.

In a polity, each citizen is to possess his own arms, which are not supplied or owned by the state.

Men become richer not only by increasing their existing wealth but also by decreasing their expenditure.

Happiness belongs to the self sufficient.

Happiness is essentially perfect; so that the happy man requires in addition the goods of the body, external goods and the gifts of fortune, in order that his activity may not be impeded through lack of them.

Misfortune shows those who are not really friends.