ARISTOTLE AND THE EARLIER PERIPATETICS vol.I by Eduard Zeller, B.F.C.Costelloe 1897

;
METAPHYSIQS 379
by Potentiality any mere logical or formal but also real
Potentiality. Matter is in itself or in its capacity
that whereof the Actuality is Form ; and consequently
Matter of itself implies Form, requires Form, owns a
natural inclination or longing (as Aristotle expresses it)
for it, is provoked by it to move and develop itself. 1
On the other hand Form is that which gives completeness
to Matter by realising its potential capacities ; it
is the Energy or Entelechy of Matter. 2 But the
be said of that which by its very
nature could not be ; but this
could not be potential, and he
therefore denies (as was pointed
outatp. 366,n. 1-) that in things of
eternal duration there can be any
potentiality without actuality.
dpii^iv are parallel phrases ; Anal.
Post. ii. 11, 94, b, 37, where
inner necessity, av&yteq icai-a t^v
(piirisi koI dpin.hv, is distinguished
from compulsion, avdjRTi irapa
tV