And since that which 'is' has two senses, we must say that everything changes from that which is potentially to that which is actually, e.g. from potentially white to actually white, and similarly in the case of increase and diminution.
15) Eta "den-a" bi modutan ematen denez, aldaketa oro potentzian izatetik egintzan izatera ematen da (adibidez, zuria potentzian izatetik zuria egintzan izatera, eta berdin handitzeari eta gutxitzeari dagokienez);