Descriptione naturae:  Halm with one MS.  (G) gives praescriptione, which is in II. 140, cf. also praescriberet above.  The phrase is Antiochean; cf. prima constitutio naturae in D.F. IV. 15. Aequitas:  not in the Roman legal sense, but as a translation of [Greek:  epieikeia]. Eaeque:  so Halm for MSS. haeque, haecque.  Of course haecque, like hicque, sicque, would be un-Ciceronian. Voluptatibus:  a side blow at the Epicureans. Forma see n. on 33.

Sec.Sec.24—­29.  Part III of Varro’s Exposition.  Antiochus’ Physics.  Summary.  All that is consists of force and matter, which are never actually found apart, though they are thought of as separate.  When force impresses form on the formless matter, it becomes a formed entity ([Greek:  poion ti] or quale)—­(24).  These formed entities are either primary or secondary.  Air, fire, water, earth are primary, the two first having an active, the two last a passive function.  Aristotle added a fifth (26).  Underlying all formed entities is the formless matter, matter and space are infinitely subdivisible (27).  Force or form acts on the formless matter and so produces the ordered universe, outside which no matter exists.  Reason permeates the universe and makes it eternal.  This Reason has various names—­Soul of the Universe, Mind, Wisdom, Providence, Fate, Fortune are only different titles for the same thing (28, 29).

Sec.24. Natura:  this word, it is important to observe, has to serve as a translation both of [Greek:  physis] and [Greek:  ousia].  Here it is [Greek:  ousia] in the broadest sense, all that exists. In res duas:  the distinction between Force and Matter, the active and passive agencies in the universe, is of course Aristotelian and Platonic.  Antiochus however probably apprehended the distinction as modified by the Stoics, for this read carefully Zeller, 135 sq., with the footnotes.  The clearest view of Aristotle’s doctrine is to be got from Schwegler, Handbook, pp 99—­105.  R. and P. 273 sq. should be consulted for the important coincidence of Force with logical genus ([Greek:  eidos]), and of Matter ([Greek:  hyle]) with logical differentia ([Greek:  diaphora]).  For the duae res, cf. D.F. I. 18. Efficiens ... huic se praebens:  an attempt to translate [Greek:  to poioun] and [Greek:  to paschon] of the Theaetetus, [Greek:  to othen] and [Greek:  to dechomenon] of the Timaeus (50 D).  Cic. in Tim. has efficere and pati, Lucretius I. 440 facere and fungi. Ea quae:  so Gruter, Halm for MSS. eaque. The meaning is this; passive matter when worked upon by an active generative form results in an aliquid, a [Greek:  tode ti] as Aristotle calls it.  Passive matter [Greek:  hyle] is only potentially [Greek:  tode ti], passing into actual [Greek: