But each set of principles we must try to investigate in the natural way, and we must take pains to state them definitely, since they have a great influence on what follows. For the beginning is thought to be more than half of the whole, and many of the questions we ask are cleared up by it.
(5) Beraz, bakoitzaren natura kontuan hartuz saiatu behar da printzipioetara zuzentzen, eta zorrotz ahalegindu prinzipioak ongi zehatz daitezen, ondorengoari begira eragin handia baitute. Badirudi, hain zuzen ere, prinzipioa osotasunaren erdia baino gehiago dela, eta haren medioz bilatzen diren gauza asko argitu egiten direla.