We think there is color, we think there is sweet, we think there is bitter, but in reality there are atoms and a void.

It is hard to fight desire; but to control it is the sign of a reasonable man.

By convention sweet is sweet, by convention bitter is bitter, by convention hot is hot, by convention cold is cold, by convention color is color. But in reality there are atoms and the void. That is, the objects of sense are supposed to be real and it is customary to regard them as such, but in truth they are not. Only the atoms and the void are real.

If you would know contentment, let your deeds be few.

Life unexamined, is not worth living.

No power and no treasure can outweigh the extension of our knowledge.

Sweet exists by convention, bitter by convention, color by convention; but in reality atoms and the void alone exist