xix.); and further, since that which we, in accordance with reason, deem good or bad, necessarily is good or bad (II. xli.); it follows that men, in so far as they live in obedience to reason, necessarily do only such things as are necessarily good for human nature, and consequently for each individual man (IV. xxxi. Coroll.); in other words, such things as are in harmony with each man's nature.
41. Prop. arab.), orduan, gizakiek Arrazoiaren gidaritzapean bizi diren neurrian soilik egiten dituzte nahitaez giza izaerarentzat eta, ondorioz, gizaki bakoitzarentzat nahitaez onak diren gauzak, erran nahi baita, (31. Prop. Korol. arab.) edozein gizakiren izaerarekin bat datozen gauzak.