Full Idea
Powers must surely issue in manifestations that are something more than just powers. A world where potency never issued in act, but only in more potency, would be one where one travelled without ever having the possibility of arriving.
Gist of Idea
Powers must result in some non-powers, or there would only be potential without result
Source
David M. Armstrong (Truth and Truthmakers [2004], 10.4)
Book Reference
Armstrong,D.M.: 'Truth and Truthmakers' [CUP 2004], p.139
A Reaction
Tricky. The picture I favour is that the distinction between powers and categorical properties is a misunderstanding. What is fundamental is active and powerful categoricals.