Knowledge of the soul is the only universal truth and the only wisdom - all other knowledge is transient.

A person who is good for anything ought not to calculate the chance of living or dying; he or she ought only to consider whether in doing anything he or she is doing right or wrong- acting the part of a good person or a bad person.

Until philosophers are kings, or the kings and princes of this world have the spirit and power of philosophy, and political greatness and wisdom meet in one, and those commoner natures who pursue either to the exclusion of the other are compelled to stand aside, cities will never have rest from their evils - no, nor the human race, as I believe - and then only will this our State have a possibility of life and behold the light of day.

A house that has a library in it has a soul.

Democracy leads to anarchy, which is mob rule.

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

What essence is to generation, that truth is to belief.