Original: The text is derived from sections 1.10.32-33 of Cicero's De finibus bonorum et malorum (On the Boundaries of Goods and Evils, or alternatively (About) The Purposes of Good and Evil).
Simplified: The text is derived from Cicero's De finibus bonorum et malorum (On the Ends of Goods and Evils, sometimes the title is translated as (About) The Purposes of Good and Evil).