The soul is cured of its maladies by certain incantations; these incantations are beautiful reasons, from which temperance is generated in souls.

The understanding of mathematics is necessary for a sound grasp of ethics.

My belief is that to have no wants is divine.

The hardest task needs the lightest hand or else its completion will not lead to freedom but to a tyranny much worse than the one it replaces.

Men of Athens, I honor and love you; but I shall obey God rather than you, and while I have life and strength I shall never cease from the practice and teaching of philosophy.

To know, is to know that you know nothing. That is the meaning of true knowledge. For a man who claims to have knowledge, while actually knowing nothing, is less smarter than you, who claim to know nothing.

Give me beauty in the inward soul; and may the outward and inward may be one.