Until philosophers rule as kings or those who are now called kings and leading men genuinely and adequately philosophise, that is, until political power and philosophy entirely coincide, while the many natures who at present pursue either one exclusively are forcibly prevented from doing so, cities will have no rest from evils,... nor, I think, will the human race.

The price of apathy towards public affairs is to be ruled by evil men.

Education is teaching our children to desire the right things.

That politician who curries favor with the citizens and indulges them and fawns upon them and has a presentiment of their wishes, and is skillful in gratifying them, he is esteemed a great statesman.

The Earth is like one of those balls made of twelve pieces of skin.

Necessity is literally the mother of invention.

We must, if we are to be consistent, and if we re to have a real pedigree herd, mate the best of our men with the best of our women as often as possible, and the inferior men with the inferior women as seldom as possible, and keep only the offspring of the best.