Life unexamined, is not worth living.

The first principles of the universe are atoms and empty space; everything else is merely thought to exist.

Poor mind, from the senses you take your arguments, and then want to defeat them? Your victory is your defeat.

To a wise and good man the whole earth is his fatherland.

The word is the shadow of the deed.

These differences, they say, are three: shape, arrangement, and position; because they hold that what is differs only in contour, inter-contact, inclination.

All things happen by virtue of necessity.