The cause of all sins in every case lies in the person's excessive love of self.

He who is learning and learning and doesn't apply what he knows is like the one who is plowing and plowing and doesn't seed.

Worthy of honor is he who does no injustice, and more than twofold honor, if he not only does no injustice himself, but hinders others from doing any.

We will be better men, braver and less idle, if we believe that one must search for the things one does not know, rather than if we believe that it is not possible to find out what we do not know and that we must not look for it.

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.

Maximize the power of the beliefs that strengthen you and neutralize those that weaken you.

Access to power must be confined to those who are not in love with it.