"The greatest penalty of evildoing is to grow into the likeness of bad men."

"The general principle of the state, that of justice, is for everyone to do their own business and not to be a busybody."

"The poets, beginning with Homer, are to be banished from the ideal city because they appeal to the emotions and irrational parts of the soul, and distort the truth."

"The worst of all deceptions is self-deception."

"The ignorance of one who thinks he knows what he does not know, is the cause of all errors."