"Nothing comes into being out of nothing."

"Nature has no end in view, and all final causes are nothing but human figments."

"The world would be much more happy if men were to govern their passions by reason, than if they were to leave them unbridled."

"The highest good of those who follow virtue is common to all, and all can equally participate in it."

"A free man thinks of death least of all things; and his wisdom is a meditation not of death but of life."