Further, if the causes of substances are the causes of all things, yet different things have different causes and elements, as was said; the causes of things that are not in the same class, e.g.
Gainera, substantzien kausak diren arren, hala ere, esan bezala, kausak eta printzipioak desberdinak dira genero berekoak ez 25) diren gauza desberdinetan-koloreak, soinuak, substantziak eta kantitatea, esate baterako-, analogiaz ez bada.