Now since activities are made precise and more enduring and better by their proper pleasure, and injured by alien pleasures, evidently the two kinds of pleasure are far apart. For alien pleasures do pretty much what proper pains do, since activities are destroyed by their proper pains;
(20) Hortaz, jarduerei dagokienez, berez dagozkien plazeren eta atsekabeen ondorioak kontrakoak direla gertatzen da, eta jarduera baten berezkoak jarduerak berez sorturikoak dira;