Friendship is two souls inhabiting one body.

Man's best friend is one who wishes well to the object of his wish for his sake, even if no one is to know of it.

Education and morals make the good man, the good statesman, the good ruler.

The activity of happiness must occupy an entire lifetime; for one swallow does not a summer make.

It is clear, then, that the earth must be at the centre and immovable, not only for the reasons already given, but also because heavy bodies forcibly thrown quite straight upward return to the point from which they started, even if they are thrown to an infinite distance. From these considerations then it is clear that the earth does not move and does not lie elsewhere than at the centre.

Equality consists in the same treatment of similar persons.

For those who possess and can wield arms are in a position to decide whether the constitution is to continue or not