Now since there are differences of degree in hot and cold, then although when either is actual without qualification, the other will exist potentially; yet, when neither exists in the full completeness of its being, but both by combining destroy one another's excesses so that there exist instead a hot which (for a hot) is cold and a cold which (for a cold) is hot; then there will exist neither their matter, nor either of the contraries in actuality without qualification, but rather an intermediate; and this intermediate, according as it is potentially more hot than cold or vice versa, will in accordance with that proportion be potentially twice as hot or as cold or three times or whatever.