d substance in this sense is
&gt; | actuality (entelecheia).
&gt; |
&gt; | Aristotle, "Peri Psyche", 2.1.
&gt;
&gt; | The passage from power to entelechy takes place
&gt; | by means of change (kinesis).  This is the
&gt; | imperfect energy, the perfected energy
&gt; | is the entelechy.
&gt; |
&gt; | CSP, CE 5, 404.
&gt;
&gt; | I shall, therefore, venture to call Sum (m.v^2)/2
&gt; | the kinetic act or kinetic energy and the negative
&gt; | of the potential, the kinetic power or kinetic
&gt; | potency.  For 