Beauty of style and harmony and grace and good rhythm depend on simplicity - I mean the true simplicity of a rightly and nobly ordered mind and character, not that other simplicity which is only a euphemism for folly.

The only real ill-doing is the deprivation of knowledge.

Much sleep is not required by nature, either for our souls or bodies, or for the action in which they are concerned.

Boys should abstain from all use of wine until their eighteenth year, for it is wrong to add fire to fire.

The first step in learning is the destruction of human conceit.

The learning and knowledge that we have,is,at the most,but little compared with that of which we are ignorant.

The human race will have no respite from evils until those who are really philosophers acquire political power or until, through some divine dispensation, those who rule and have political authority in the cities become real philosophers.