Power of action is a consequence of perfection in nature.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic perfection action
Date 1274
Language English
Reference
Note Translated by Fathers of the English Dominican Province
Weblink http://www.gutenberg.org/cache/epub/17611/pg17611-images.html

Context

“and hence He is not equal to Him power. On the contrary, It is said (John 5:19) : "Whatsoever things the Father doth, these the Son also doth in like manner." I answer that, The Son is necessarily equal to the Father in power. Power of action is a consequence of perfection in nature. In creatures, for instance, we see that the more perfect the nature, the greater power is there for action. Now it was shown above (A. 4) that the very notion of the divine paternity and filiation requires that the Son should be the Father's equal in greatness—that is, in perfection of nature.” source