(2) Things that are active or passive imply an active or a passive potency and the actualizations of the potencies; e.g. that which is capable of heating is related to that which is capable of being heated, because it can heat it, and, again, that which heats is related to that which is heated and that which cuts to that which is cut, in the sense that they actually do these things.
Bestalde, aktibo dena eta pasibo dena potentzia aktiboarekiko eta potentzia pasiboarekiko izaten dira, eta potentzia hauen ekintzen arabera; adibidez, berotzeko gai dena berogarri denarekiko, hau egin dezakeelako eta, era berean, eragileak diren aldetik, berotzen ari dena berotua izaten ari denarekiko, eta mozten ari dena moztua izaten ari denarekiko.