The Summary of Physics Restored

110Of those four wheels, two—moisture and dryness—belong more closely to matter, because Nature turns matter between these two limits and accomplishes her successive changes. These two qualities are closer to matter because they are more subject to being acted upon and changed. The other two, heat and cold, are more active, because in their turns they alter and transform the former pair. The former undergo action; the latter act more, and are like the active instruments with which Nature handles matter capable of being acted upon.