I would rather discover one true cause than gain the kingdom of Persia.

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

Do not trust all men, but trust men of worth; the former course is silly, the latter a mark of prudence.

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

According to convention there is a sweet and a bitter, a hot and a cold, and according to convention, there is an order. In truth, there are atoms and a void.

The person who can laugh with life has developed deep roots with confidence and faith-faith in oneself, in people and in the world, as contrasted to negative ideas with distrust and discouragement.

Nothing exists except atoms and empty space; everything else is opinion.