Plutarch, De primo frigido
Goodwin, Ed.

First, we might question this way of arguing, as being that which would abolish several manifest faculties, as being neither qualities nor habits, but the privations of habits and qualities; so as to make ponderosity the privation of levity, hardness the privation of softness, black of white, bitter of sweet, and so with other things which are naturally opposed to each other in their power and not as a privation to a habit. Or else for this reason, because all privation is a thing altogether sluggish and without action, as blindness, deafness, silence, and death; for they are the [p. 310] departure of forms, and the utter defacings of substances, not being natures nor substances of themselves; but cold, wherever it resides, causes no less affections and alterations in bodies than heat. For many things are congealed by cold, many things thereby condensed. So that whatever is solid in it and difficult to be moved cannot be said to be sluggish and void of action, but firm and ponderous, as being supported by its own strength, which is endued with a power to preserve it in its proper station. Wherefore privation is the deficiency and departure of the opposite power, but many things are subject to be cold, though abounding with heat within themselves. And there are some things which cold the more condenses and consolidates the hotter they are, as iron quenched in water. The Stoics also affirm, that the spirit which is in the bodies of infants is quickened by refrigeration, and changing its Nature, turns to a soul. But this is a thing much to be disputed. Neither is it rational to believe that cold, which is the productive agent in many other things, can be a privation.